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      1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 # IMPORTANT:
      6 # Please don't directly include this file if you are building via gyp_chromium,
      7 # since gyp_chromium is automatically forcing its inclusion.
      8 {
      9   # Variables expected to be overriden on the GYP command line (-D) or by
     10   # ~/.gyp/include.gypi.
     11   'variables': {
     12     # Putting a variables dict inside another variables dict looks kind of
     13     # weird.  This is done so that 'host_arch', 'chromeos', etc are defined as
     14     # variables within the outer variables dict here.  This is necessary
     15     # to get these variables defined for the conditions within this variables
     16     # dict that operate on these variables.
     17     'variables': {
     18       'variables': {
     19         'variables': {
     20           'variables': {
     21             # Whether we're building a ChromeOS build.
     22             'chromeos%': 0,
     23 
     24             # Whether we're building the cast (chromecast) shell
     25             'chromecast%': 0,
     26 
     27             # Whether or not we are using the Aura windowing framework.
     28             'use_aura%': 0,
     29 
     30             # Whether or not we are building the Ash shell.
     31             'use_ash%': 0,
     32 
     33             # Whether or not we are using CRAS, the ChromeOS Audio Server.
     34             'use_cras%': 0,
     35 
     36             # Use a raw surface abstraction.
     37             'use_ozone%': 0,
     38 
     39             # Configure the build for small devices. See crbug.com/318413
     40             'embedded%': 0,
     41 
     42             'conditions': [
     43               # Compute the architecture that we're building on.
     44               ['OS=="win" or OS=="mac" or OS=="ios"', {
     45                 'host_arch%': 'ia32',
     46               }, {
     47                 'host_arch%': '<!pymod_do_main(detect_host_arch)',
     48               }],
     49             ],
     50           },
     51           # Copy conditionally-set variables out one scope.
     52           'chromeos%': '<(chromeos)',
     53           'chromecast%': '<(chromecast)',
     54           'use_aura%': '<(use_aura)',
     55           'use_ash%': '<(use_ash)',
     56           'use_cras%': '<(use_cras)',
     57           'use_ozone%': '<(use_ozone)',
     58           'embedded%': '<(embedded)',
     59           'host_arch%': '<(host_arch)',
     60 
     61           # Whether we are using Views Toolkit
     62           'toolkit_views%': 0,
     63 
     64           # Use OpenSSL instead of NSS as the underlying SSL and crypto
     65           # implementation. Certificate verification will in most cases be
     66           # handled by the OS. If OpenSSL's struct X509 is used to represent
     67           # certificates, use_openssl_certs must be set.
     68           'use_openssl%': 0,
     69 
     70           # Typedef X509Certificate::OSCertHandle to OpenSSL's struct X509*.
     71           'use_openssl_certs%': 0,
     72 
     73           # Disable viewport meta tag by default.
     74           'enable_viewport%': 0,
     75 
     76           # Enable HiDPI support.
     77           'enable_hidpi%': 0,
     78 
     79           # Override buildtype to select the desired build flavor.
     80           # Dev - everyday build for development/testing
     81           # Official - release build (generally implies additional processing)
     82           # TODO(mmoss) Once 'buildtype' is fully supported (e.g. Windows gyp
     83           # conversion is done), some of the things which are now controlled by
     84           # 'branding', such as symbol generation, will need to be refactored
     85           # based on 'buildtype' (i.e. we don't care about saving symbols for
     86           # non-Official # builds).
     87           'buildtype%': 'Dev',
     88 
     89           # Override branding to select the desired branding flavor.
     90           'branding%': 'Chromium',
     91 
     92           'conditions': [
     93             # ChromeOS and Windows use Aura and Ash.
     94             ['chromeos==1 or OS=="win" or OS=="linux"', {
     95               'use_ash%': 1,
     96               'use_aura%': 1,
     97             }],
     98 
     99             ['chromecast==1 and OS!="android"', {
    100               'embedded%': 1,
    101               'use_ozone%': 1,
    102             }],
    103 
    104             # Ozone uses Aura.
    105             ['use_ozone==1', {
    106               'use_aura%': 1,
    107             }],
    108 
    109             # Whether we're a traditional desktop unix.
    110             ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and chromeos==0', {
    111               'desktop_linux%': 1,
    112             }, {
    113               'desktop_linux%': 0,
    114             }],
    115 
    116             # Embedded implies ozone.
    117             ['embedded==1', {
    118               'use_ozone%': 1,
    119             }],
    120 
    121             ['OS=="android"', {
    122               'target_arch%': 'arm',
    123             }, {
    124               # Default architecture we're building for is the architecture we're
    125               # building on, and possibly sub-architecture (for iOS builds).
    126               'target_arch%': '<(host_arch)',
    127             }],
    128           ],
    129         },
    130         # Copy conditionally-set variables out one scope.
    131         'chromeos%': '<(chromeos)',
    132         'chromecast%': '<(chromecast)',
    133         'desktop_linux%': '<(desktop_linux)',
    134         'use_aura%': '<(use_aura)',
    135         'use_ash%': '<(use_ash)',
    136         'use_cras%': '<(use_cras)',
    137         'use_ozone%': '<(use_ozone)',
    138         'embedded%': '<(embedded)',
    139         'use_openssl%': '<(use_openssl)',
    140         'use_openssl_certs%': '<(use_openssl_certs)',
    141         'enable_viewport%': '<(enable_viewport)',
    142         'enable_hidpi%': '<(enable_hidpi)',
    143         'buildtype%': '<(buildtype)',
    144         'branding%': '<(branding)',
    145         'host_arch%': '<(host_arch)',
    146         'target_arch%': '<(target_arch)',
    147 
    148         'target_subarch%': '',
    149 
    150         # This is set when building the Android WebView inside the Android
    151         # build system, using the 'android' gyp backend. The WebView code is
    152         # still built when this is unset, but builds using the normal chromium
    153         # build system.
    154         'android_webview_build%': 0,
    155 
    156         # This is set when building the Android WebView in ninja for the
    157         # telemetry bot.
    158         'android_webview_telemetry_build%': 0,
    159 
    160         # Set ARM architecture version.
    161         'arm_version%': 7,
    162 
    163         # Use aurax11 for clipboard implementation. This is true on linux_aura.
    164         'use_clipboard_aurax11%': 0,
    165 
    166         # goma settings.
    167         # 1 to use goma.
    168         # If no gomadir is set, it uses the default gomadir.
    169         'use_goma%': 0,
    170         'gomadir%': '',
    171 
    172         # The system root for cross-compiles. Default: none.
    173         'sysroot%': '',
    174         'chroot_cmd%': '',
    175 
    176         # The system libdir used for this ABI.
    177         'system_libdir%': 'lib',
    178 
    179         # Default MIPS arch variant. This is set in the conditions block
    180         # below for MIPS targets.
    181         'mips_arch_variant%': '',
    182 
    183         'conditions': [
    184           # Ash needs Aura.
    185           ['use_aura==0', {
    186             'use_ash%': 0,
    187           }],
    188 
    189           # Set default value of toolkit_views based on OS.
    190           ['OS=="win" or chromeos==1 or use_aura==1', {
    191             'toolkit_views%': 1,
    192           }, {
    193             'toolkit_views%': 0,
    194           }],
    195 
    196           # Embedded builds use aura without ash or views.
    197           ['embedded==1', {
    198             'use_aura%': 1,
    199             'use_ash%': 0,
    200             'toolkit_views%': 0,
    201           }],
    202 
    203           # Enable HiDPI on Mac OS, Chrome OS and Windows.
    204           ['OS=="mac" or chromeos==1 or OS=="win"', {
    205             'enable_hidpi%': 1,
    206           }],
    207 
    208           # Enable the OpenSSL backend on Mac OS.
    209           ['OS=="mac"', {
    210             'use_openssl%': 1,
    211           }],
    212 
    213           # Enable App Launcher everywhere but mobile.
    214           ['OS!="ios" and OS!="android"', {
    215             'enable_app_list%': 1,
    216           }, {
    217             'enable_app_list%': 0,
    218           }],
    219 
    220           ['use_aura==1 or (OS!="win" and OS!="mac" and OS!="ios" and OS!="android")', {
    221             'use_default_render_theme%': 1,
    222           }, {
    223             'use_default_render_theme%': 0,
    224           }],
    225 
    226           ['use_ozone==1', {
    227             'use_ozone_evdev%': 1,
    228           }, {
    229             'use_ozone_evdev%': 0,
    230           }],
    231 
    232           # Set default gomadir.
    233           ['OS=="win"', {
    234             'gomadir': 'c:\\goma\\goma-win',
    235           }, {
    236             'gomadir': '<!(/bin/echo -n ${HOME}/goma)',
    237           }],
    238 
    239           # Set the default "target_subarch" on iOS. Valid values are "arm32",
    240           # "arm64" and "both" (meaning a fat binary).
    241           #
    242           # TODO(sdefresne): change the default from "arm32" to "both" for
    243           # "target_subarch" once http://crbug.com/339477 is fixed.
    244           #
    245           # TODO(sdefresne): set the "target_arch" to "arm" once compilation
    246           # of skia has been fixed for simulator. http://crbug.com/342377
    247           ['OS=="ios"', {
    248             'target_subarch%': 'arm32',
    249           }],
    250 
    251           # Set arch variants for MIPS platforms.
    252           ['target_arch=="mips64el"', {
    253             'conditions': [
    254               ['OS=="android"', {
    255                 'mips_arch_variant%': 'r6',
    256               }, {
    257                 'mips_arch_variant%': 'r2',
    258               }],
    259             ],
    260           }],
    261 
    262           ['target_arch=="mipsel"', {
    263             'mips_arch_variant%': 'r1',
    264           }],
    265         ],
    266       },
    267 
    268       # Copy conditionally-set variables out one scope.
    269       'chromeos%': '<(chromeos)',
    270       'chromecast%': '<(chromecast)',
    271       'host_arch%': '<(host_arch)',
    272       'target_arch%': '<(target_arch)',
    273       'target_subarch%': '<(target_subarch)',
    274       'mips_arch_variant%': '<(mips_arch_variant)',
    275       'toolkit_views%': '<(toolkit_views)',
    276       'desktop_linux%': '<(desktop_linux)',
    277       'use_aura%': '<(use_aura)',
    278       'use_ash%': '<(use_ash)',
    279       'use_cras%': '<(use_cras)',
    280       'use_ozone%': '<(use_ozone)',
    281       'use_ozone_evdev%': '<(use_ozone_evdev)',
    282       'use_clipboard_aurax11%': '<(use_clipboard_aurax11)',
    283       'embedded%': '<(embedded)',
    284       'use_openssl%': '<(use_openssl)',
    285       'use_openssl_certs%': '<(use_openssl_certs)',
    286       'enable_viewport%': '<(enable_viewport)',
    287       'enable_hidpi%': '<(enable_hidpi)',
    288       'android_webview_build%': '<(android_webview_build)',
    289       'android_webview_telemetry_build%': '<(android_webview_telemetry_build)',
    290       'use_goma%': '<(use_goma)',
    291       'gomadir%': '<(gomadir)',
    292       'enable_app_list%': '<(enable_app_list)',
    293       'use_default_render_theme%': '<(use_default_render_theme)',
    294       'buildtype%': '<(buildtype)',
    295       'branding%': '<(branding)',
    296       'arm_version%': '<(arm_version)',
    297       'sysroot%': '<(sysroot)',
    298       'chroot_cmd%': '<(chroot_cmd)',
    299       'system_libdir%': '<(system_libdir)',
    300 
    301       # Set to 1 to enable fast builds. Set to 2 for even faster builds
    302       # (it disables debug info for fastest compilation - only for use
    303       # on compile-only bots).
    304       'fastbuild%': 0,
    305 
    306       # Set to 1 to not store any build metadata (this isn't working yet but
    307       # this flag will help us to get there). See http://crbug.com/314403.
    308       # TODO(sebmarchand): Update this comment once this flag guarantee that
    309       #     there's no build metadata in the build artifacts.
    310       'dont_embed_build_metadata%': 0,
    311 
    312       # Set to 1 to force Visual C++ to use legacy debug information format /Z7.
    313       # This is useful for parallel compilation tools which can't support /Zi.
    314       # Only used on Windows.
    315       'win_z7%' : 0,
    316 
    317       # Set to 1 to enable dcheck in release.
    318       'dcheck_always_on%': 0,
    319 
    320       # Set to 1 to make a build that disables unshipped tracing events.
    321       # Note: this setting is ignored if buildtype=="Official".
    322       'tracing_like_official_build%': 0,
    323 
    324       # Disable image loader component extension by default.
    325       'image_loader_extension%': 0,
    326 
    327       # Set NEON compilation flags.
    328       'arm_neon%': 1,
    329 
    330       # Detect NEON support at run-time.
    331       'arm_neon_optional%': 0,
    332 
    333       # Use libjpeg-turbo as the JPEG codec used by Chromium.
    334       'use_libjpeg_turbo%': 1,
    335 
    336       # Use system libjpeg. Note that the system's libjepg will be used even if
    337       # use_libjpeg_turbo is set.
    338       'use_system_libjpeg%': 0,
    339 
    340       # By default, component is set to static_library and it can be overriden
    341       # by the GYP command line or by ~/.gyp/include.gypi.
    342       'component%': 'static_library',
    343 
    344       # Set to select the Title Case versions of strings in GRD files.
    345       'use_titlecase_in_grd%': 0,
    346 
    347       # Use translations provided by volunteers at launchpad.net.  This
    348       # currently only works on Linux.
    349       'use_third_party_translations%': 0,
    350 
    351       # Remoting compilation is enabled by default. Set to 0 to disable.
    352       'remoting%': 1,
    353 
    354       # Configuration policy is enabled by default. Set to 0 to disable.
    355       'configuration_policy%': 1,
    356 
    357       # Variable safe_browsing is used to control the build time configuration
    358       # for safe browsing feature. Safe browsing can be compiled in 3 different
    359       # levels: 0 disables it, 1 enables it fully, and 2 enables only UI and
    360       # reporting features without enabling phishing and malware detection. This
    361       # is useful to integrate a third party phishing/malware detection to
    362       # existing safe browsing logic.
    363       'safe_browsing%': 1,
    364 
    365       # Web speech is enabled by default. Set to 0 to disable.
    366       'enable_web_speech%': 1,
    367 
    368       # Notifications are compiled in by default. Set to 0 to disable.
    369       'notifications%' : 1,
    370 
    371       # Use dsymutil to generate real .dSYM files on Mac. The default is 0 for
    372       # regular builds and 1 for ASan builds.
    373       'mac_want_real_dsym%': 'default',
    374 
    375       # If this is set, the clang plugins used on the buildbot will be used.
    376       # Run tools/clang/scripts/update.sh to make sure they are compiled.
    377       # This causes 'clang_chrome_plugins_flags' to be set.
    378       # Has no effect if 'clang' is not set as well.
    379       'clang_use_chrome_plugins%': 1,
    380 
    381       # Enable building with ASAN (Clang's -fsanitize=address option).
    382       # -fsanitize=address only works with clang, but asan=1 implies clang=1
    383       # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
    384       'asan%': 0,
    385       # Enable coverage gathering instrumentation in ASan. This flag also
    386       # controls coverage granularity (1 for function-level coverage, 2 for
    387       # block-level coverage).
    388       'asan_coverage%': 0,
    389 
    390       # Enable Chromium overrides of the default configurations for various
    391       # dynamic tools (like ASan).
    392       'use_sanitizer_options%': 0,
    393 
    394       # Enable building with SyzyAsan.
    395       # See https://code.google.com/p/sawbuck/wiki/SyzyASanHowTo
    396       'syzyasan%': 0,
    397 
    398       # Enable building with LSan (Clang's -fsanitize=leak option).
    399       # -fsanitize=leak only works with clang, but lsan=1 implies clang=1
    400       # See https://sites.google.com/a/chromium.org/dev/developers/testing/leaksanitizer
    401       'lsan%': 0,
    402 
    403       # Enable building with TSan (Clang's -fsanitize=thread option).
    404       # -fsanitize=thread only works with clang, but tsan=1 implies clang=1
    405       # See http://clang.llvm.org/docs/ThreadSanitizer.html
    406       'tsan%': 0,
    407       'tsan_blacklist%': '<(PRODUCT_DIR)/../../tools/memory/tsan_v2/ignores.txt',
    408 
    409       # Enable building with MSan (Clang's -fsanitize=memory option).
    410       # MemorySanitizer only works with clang, but msan=1 implies clang=1
    411       # See http://clang.llvm.org/docs/MemorySanitizer.html
    412       'msan%': 0,
    413       'msan_blacklist%': '<(PRODUCT_DIR)/../../tools/msan/blacklist.txt',
    414       # Track where uninitialized memory originates from. From fastest to
    415       # slowest: 0 - no tracking, 1 - track only the initial allocation site, 2
    416       # - track the chain of stores leading from allocation site to use site.
    417       'msan_track_origins%': 1,
    418 
    419       # Enable building with UBSan (Clang's -fsanitize=undefined option).
    420       # -fsanitize=undefined only works with clang, but ubsan=1 implies clang=1
    421       # See http://clang.llvm.org/docs/UsersManual.html
    422       'ubsan%': 0,
    423 
    424       # Enable building with UBsan's vptr (Clang's -fsanitize=vptr option).
    425       # -fsanitize=vptr only works with clang, but ubsan_vptr=1 implies clang=1
    426       'ubsan_vptr%': 0,
    427       'ubsan_vptr_blacklist%': '<(PRODUCT_DIR)/../../tools/ubsan_vptr/blacklist.txt',
    428 
    429       # Use the dynamic libraries instrumented by one of the sanitizers
    430       # instead of the standard system libraries.
    431       'use_instrumented_libraries%': 0,
    432 
    433       # Use libc++ (third_party/libc++ and third_party/libc++abi) instead of
    434       # stdlibc++ as standard library. This is intended to use for instrumented
    435       # builds.
    436       'use_custom_libcxx%': 0,
    437 
    438       # Use system libc++ instead of the default C++ library, usually libstdc++.
    439       # This is intended for iOS builds only.
    440       'use_system_libcxx%': 0,
    441 
    442       # Use a modified version of Clang to intercept allocated types and sizes
    443       # for allocated objects. clang_type_profiler=1 implies clang=1.
    444       # See http://dev.chromium.org/developers/deep-memory-profiler/cpp-object-type-identifier
    445       # TODO(dmikurube): Support mac.  See http://crbug.com/123758#c11
    446       'clang_type_profiler%': 0,
    447 
    448       # Set to true to instrument the code with function call logger.
    449       # See src/third_party/cygprofile/cyg-profile.cc for details.
    450       'order_profiling%': 0,
    451 
    452       # Use the provided profiled order file to link Chrome image with it.
    453       # This makes Chrome faster by better using CPU cache when executing code.
    454       # This is known as PGO (profile guided optimization).
    455       # See https://sites.google.com/a/google.com/chrome-msk/dev/boot-speed-up-effort
    456       'order_text_section%' : "",
    457 
    458       # Set to 1 compile with -fPIC cflag on linux. This is a must for shared
    459       # libraries on linux x86-64 and arm, plus ASLR.
    460       'linux_fpic%': 1,
    461 
    462       # Whether one-click signin is enabled or not.
    463       'enable_one_click_signin%': 0,
    464 
    465       # Whether to back up data before sync.
    466       'enable_pre_sync_backup%': 0,
    467 
    468       # Enable Chrome browser extensions
    469       'enable_extensions%': 1,
    470 
    471       # Enable Google Now.
    472       'enable_google_now%': 1,
    473 
    474       # Enable printing support and UI. This variable is used to configure
    475       # which parts of printing will be built. 0 disables printing completely,
    476       # 1 enables it fully, and 2 enables only the codepath to generate a
    477       # Metafile (e.g. usually a PDF or EMF) and disables print preview, cloud
    478       # print, UI, etc.
    479       'enable_printing%': 1,
    480 
    481       # Set the version of CLD.
    482       #   0: Don't specify the version. This option is for the Finch testing.
    483       #   1: Use only CLD1.
    484       #   2: Use only CLD2.
    485       'cld_version%': 2,
    486 
    487       # For CLD2, the size of the tables that should be included in the build
    488       # Only evaluated if cld_version == 2 or if building the CLD2 dynamic data
    489       # tool explicitly.
    490       # See third_party/cld_2/cld_2.gyp for more information.
    491       #   0: Small tables, lower accuracy
    492       #   1: Medium tables, medium accuracy
    493       #   2: Large tables, high accuracy
    494       'cld2_table_size%': 2,
    495 
    496       # The data acquisition mode for CLD2. Possible values are:
    497       #   static:     CLD2 data is statically linked to the executable.
    498       #   standalone: CLD2 data is provided in a standalone file that is
    499       #               bundled with the executable.
    500       #   component:  CLD2 data is provided as a Chrome "component" and is
    501       #               downloaded via the component updater.
    502       #
    503       # For more information on switching the CLD2 data source, see:
    504       #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/compact-language-detector-cld-data-source-configuration
    505       #
    506       # This string will be exposed in chrome://translate-internals under the
    507       # heading "CLD Data Source". This allows easy determination of which
    508       # data source the browser was built with.
    509       'cld2_data_source%': 'static',
    510 
    511       # Enable spell checker.
    512       'enable_spellcheck%': 1,
    513 
    514       # Webrtc compilation is enabled by default. Set to 0 to disable.
    515       'enable_webrtc%': 1,
    516 
    517       # Enables use of the session service, which is enabled by default.
    518       # Support for disabling depends on the platform.
    519       'enable_session_service%': 1,
    520 
    521       # Enables theme support, which is enabled by default.  Support for
    522       # disabling depends on the platform.
    523       'enable_themes%': 1,
    524 
    525       # Enables autofill dialog and associated features; disabled by default.
    526       'enable_autofill_dialog%' : 0,
    527 
    528       # Defaults Wallet integration in Autofill dialog to use production
    529       # servers. Unofficial builds won't have the proper API keys.
    530       'enable_prod_wallet_service%': 0,
    531 
    532       # Enables support for background apps.
    533       'enable_background%': 1,
    534 
    535       # Enable the task manager by default.
    536       'enable_task_manager%': 1,
    537 
    538       # Enables used resource whitelist generation; disabled by default.
    539       'enable_resource_whitelist_generation%': 0,
    540 
    541       # Enable FILE support by default.
    542       'disable_file_support%': 0,
    543 
    544       # Enable FTP support by default.
    545       'disable_ftp_support%': 0,
    546 
    547       # Use native android functions in place of ICU.  Not supported by most
    548       # components.
    549       'use_icu_alternatives_on_android%': 0,
    550 
    551       # XInput2 multitouch support is enabled by default (use_xi2_mt=2).
    552       # Setting to zero value disables XI2 MT. When XI2 MT is enabled,
    553       # the input value also defines the required XI2 minor minimum version.
    554       # For example, use_xi2_mt=2 means XI2.2 or above version is required.
    555       'use_xi2_mt%': 2,
    556 
    557       # Use of precompiled headers on Windows.
    558       #
    559       # This variable may be explicitly set to 1 (enabled) or 0
    560       # (disabled) in ~/.gyp/include.gypi or via the GYP command line.
    561       # This setting will override the default.
    562       #
    563       # See
    564       # http://code.google.com/p/chromium/wiki/WindowsPrecompiledHeaders
    565       # for details.
    566       'chromium_win_pch%': 0,
    567 
    568       # Clang stuff.
    569       'make_clang_dir%': 'third_party/llvm-build/Release+Asserts',
    570       # Set this to true when building with Clang.
    571       # See http://code.google.com/p/chromium/wiki/Clang for details.
    572       # If this is set, clang is used as both host and target compiler in
    573       # cross-compile builds.
    574       'clang%': 0,
    575 
    576       # Enable plug-in installation by default.
    577       'enable_plugin_installation%': 1,
    578 
    579       # Specifies whether to use canvas_skia.cc in place of platform
    580       # specific implementations of gfx::Canvas. Affects text drawing in the
    581       # Chrome UI.
    582       # TODO(asvitkine): Enable this on all platforms and delete this flag.
    583       #                  http://crbug.com/105550
    584       'use_canvas_skia%': 0,
    585 
    586       # Set to "tsan", "memcheck", or "drmemory" to configure the build to work
    587       # with one of those tools.
    588       'build_for_tool%': '',
    589 
    590       # If no directory is specified then a temporary directory will be used.
    591       'test_isolation_outdir%': '',
    592       # True if isolate should fail if the isolate files refer to files
    593       # that are missing.
    594       'test_isolation_fail_on_missing': 1,
    595 
    596       'wix_path%': '<(DEPTH)/third_party/wix',
    597 
    598       # Managed users are enabled by default.
    599       'enable_managed_users%': 1,
    600 
    601       # Platform natively supports discardable memory.
    602       'native_discardable_memory%': 0,
    603 
    604       # Platform sends memory pressure signals natively.
    605       'native_memory_pressure_signals%': 0,
    606 
    607       'data_reduction_fallback_host%' : '',
    608       'data_reduction_dev_host%' : '',
    609       'data_reduction_dev_fallback_host%' : '',
    610       'spdy_proxy_auth_origin%' : '',
    611       'spdy_proxy_auth_property%' : '',
    612       'spdy_proxy_auth_value%' : '',
    613       'data_reduction_proxy_probe_url%' : '',
    614       'data_reduction_proxy_warmup_url%' : '',
    615       'data_reduction_proxy_ssl_origin%' : '',
    616       'data_reduction_proxy_alt_origin%' : '',
    617       'data_reduction_proxy_alt_fallback_origin%' : '',
    618       'enable_mdns%' : 0,
    619       'enable_service_discovery%': 0,
    620       'enable_wifi_bootstrapping%': 0,
    621       'enable_hangout_services_extension%': 0,
    622 
    623        # Enable the Syzygy optimization step.
    624       'syzygy_optimize%': 0,
    625 
    626       # Enable hole punching for the protected video.
    627       'video_hole%': 0,
    628 
    629       # Temporary hack to allow us to unify blink's definitions of load
    630       # completion. blink uses a crazy set of constraints to determine load
    631       # completion, but only actually requires them for layout tests. However,
    632       # we need to maintain all the old behaviors while the plumbing is put in
    633       # place on both sides of the repo boundary.
    634       'enable_load_completion_hacks%': 1,
    635 
    636       # Automatically select platforms under ozone. Turn this off to
    637       # build only explicitly selected platforms.
    638       'ozone_auto_platforms%': 1,
    639 
    640       # If this is set clang is used as host compiler, but not as target
    641       # compiler. Always do this by default.
    642       'host_clang%': 1,
    643 
    644       'conditions': [
    645         # A flag for POSIX platforms
    646         ['OS=="win"', {
    647           'os_posix%': 0,
    648         }, {
    649           'os_posix%': 1,
    650         }],
    651 
    652         # A flag for BSD platforms
    653         ['OS=="freebsd" or OS=="openbsd"', {
    654           'os_bsd%': 1,
    655         }, {
    656           'os_bsd%': 0,
    657         }],
    658 
    659         # NSS usage.
    660         ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and use_openssl==0', {
    661           'use_nss%': 1,
    662         }, {
    663           'use_nss%': 0,
    664         }],
    665 
    666         # When OpenSSL is used for SSL and crypto on Unix-like systems, use
    667         # OpenSSL's certificate definition.
    668         ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and use_openssl==1', {
    669           'use_openssl_certs%': 1,
    670         }, {
    671           'use_openssl_certs%': 0,
    672         }],
    673 
    674         # libudev usage.  This currently only affects the content layer.
    675         ['OS=="linux" and embedded==0', {
    676           'use_udev%': 1,
    677         }, {
    678           'use_udev%': 0,
    679         }],
    680 
    681         # Flags to use X11 on non-Mac POSIX platforms.
    682         ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or use_ozone==1', {
    683           'use_x11%': 0,
    684         }, {
    685           'use_x11%': 1,
    686         }],
    687 
    688         # Flags to use glib.
    689         ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or use_ozone==1', {
    690           'use_glib%': 0,
    691         }, {
    692           'use_glib%': 1,
    693         }],
    694 
    695         # Flags to use pango and cairo.
    696         ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or embedded==1', {
    697           'use_pango%': 0,
    698           'use_cairo%': 0,
    699         }, {
    700           'use_pango%': 1,
    701           'use_cairo%': 1,
    702         }],
    703 
    704         # DBus usage.
    705         ['OS=="linux" and embedded==0', {
    706           'use_dbus%': 1,
    707         }, {
    708           'use_dbus%': 0,
    709         }],
    710 
    711         # We always use skia text rendering in Aura on Windows, since GDI
    712         # doesn't agree with our BackingStore.
    713         # TODO(beng): remove once skia text rendering is on by default.
    714         ['use_aura==1 and OS=="win"', {
    715           'enable_skia_text%': 1,
    716         }],
    717 
    718         # A flag to enable or disable our compile-time dependency
    719         # on gnome-keyring. If that dependency is disabled, no gnome-keyring
    720         # support will be available. This option is useful
    721         # for Linux distributions and for Aura.
    722         ['OS!="linux" or chromeos==1', {
    723           'use_gnome_keyring%': 0,
    724         }, {
    725           'use_gnome_keyring%': 1,
    726         }],
    727 
    728         ['OS=="mac" or OS=="ios"', {
    729           # Mac and iOS want Title Case strings
    730           'use_titlecase_in_grd%': 1,
    731         }],
    732 
    733         # Enable loader extensions on Chrome OS.
    734         ['chromeos==1', {
    735           'image_loader_extension%': 1,
    736         }, {
    737           'image_loader_extension%': 0,
    738         }],
    739 
    740         ['OS=="win" or OS=="mac" or (OS=="linux" and chromeos==0)', {
    741           'enable_one_click_signin%': 1,
    742           'enable_pre_sync_backup%': 1,
    743         }],
    744 
    745         ['OS=="android"', {
    746           'enable_extensions%': 0,
    747           'enable_google_now%': 0,
    748           'cld_version%': 1,
    749           'enable_spellcheck%': 0,
    750           'enable_themes%': 0,
    751           'remoting%': 0,
    752           'arm_neon%': 0,
    753           'arm_neon_optional%': 1,
    754           'native_discardable_memory%': 1,
    755           'native_memory_pressure_signals%': 1,
    756           'enable_printing%': 2,
    757           'enable_task_manager%':0,
    758            # Set to 1 once we have a notification system for Android.
    759            # http://crbug.com/115320
    760           'notifications%': 0,
    761           'video_hole%': 1,
    762         }],
    763 
    764         # Android OS includes support for proprietary codecs regardless of
    765         # building Chromium or Google Chrome. We also ship Google Chrome and
    766         # Chromecast with proprietary codecs.
    767         ['OS=="android" or branding=="Chrome" or chromecast==1', {
    768           'proprietary_codecs%': 1,
    769         }, {
    770           'proprietary_codecs%': 0,
    771         }],
    772 
    773         ['OS=="mac" or OS=="ios"', {
    774           'native_discardable_memory%': 1,
    775           'native_memory_pressure_signals%': 1,
    776         }],
    777 
    778         # Enable autofill dialog for Android, Mac and Views-enabled platforms.
    779         ['toolkit_views==1 or (OS=="android" and android_webview_build==0) or OS=="mac"', {
    780           'enable_autofill_dialog%': 1,
    781 
    782           'conditions': [
    783             ['buildtype=="Official"', {
    784               'enable_prod_wallet_service%': 1,
    785             }],
    786           ]
    787         }],
    788 
    789         ['OS=="android"', {
    790           'enable_webrtc%': 1,
    791         }],
    792 
    793         ['OS=="ios"', {
    794           'disable_ftp_support%': 1,
    795           'enable_extensions%': 0,
    796           'enable_google_now%': 0,
    797           'cld_version%': 1,
    798           'enable_printing%': 0,
    799           'enable_session_service%': 0,
    800           'enable_themes%': 0,
    801           'enable_webrtc%': 0,
    802           'notifications%': 0,
    803           'remoting%': 0,
    804           'safe_browsing%': 0,
    805           'enable_managed_users%': 0,
    806           'enable_task_manager%': 0,
    807           'use_system_libcxx%': 1,
    808         }],
    809 
    810         # Use GPU accelerated cross process image transport by default
    811         # on linux builds with the Aura window manager
    812         ['use_aura==1 and OS=="linux"', {
    813           'ui_compositor_image_transport%': 1,
    814         }, {
    815           'ui_compositor_image_transport%': 0,
    816         }],
    817 
    818         # Turn precompiled headers on by default.
    819         ['OS=="win" and buildtype!="Official"', {
    820           'chromium_win_pch%': 1
    821         }],
    822 
    823         ['chromeos==1 or OS=="android" or OS=="ios" or desktop_linux==1', {
    824           'enable_plugin_installation%': 0,
    825         }, {
    826           'enable_plugin_installation%': 1,
    827         }],
    828 
    829         # Whether PPAPI is enabled.
    830         ['OS=="android" or OS=="ios" or embedded==1', {
    831           'enable_plugins%': 0,
    832         }, {
    833           'enable_plugins%': 1,
    834         }],
    835 
    836         # linux_use_bundled_gold: whether to use the gold linker binary checked
    837         # into third_party/binutils.  Force this off via GYP_DEFINES when you
    838         # are using a custom toolchain and need to control -B in ldflags.
    839         # Do not use 32-bit gold on 32-bit hosts as it runs out address space
    840         # for component=static_library builds.
    841         ['OS=="linux" and (target_arch=="x64" or target_arch=="arm")', {
    842           'linux_use_bundled_gold%': 1,
    843         }, {
    844           'linux_use_bundled_gold%': 0,
    845         }],
    846 
    847         # linux_use_bundled_binutils: whether to use the binary binutils
    848         # checked into third_party/binutils.  These are not multi-arch so cannot
    849         # be used except on x86 and x86-64 (the only two architectures which
    850         # are currently checke in).  Force this off via GYP_DEFINES when you
    851         # are using a custom toolchain and need to control -B in cflags.
    852         ['OS=="linux" and (target_arch=="x64")', {
    853           'linux_use_bundled_binutils%': 1,
    854         }, {
    855           'linux_use_bundled_binutils%': 0,
    856         }],
    857 
    858         # linux_use_gold_flags: whether to use build flags that rely on gold.
    859         # On by default for x64 Linux.
    860         ['OS=="linux" and target_arch=="x64"', {
    861           'linux_use_gold_flags%': 1,
    862         }, {
    863           'linux_use_gold_flags%': 0,
    864         }],
    865 
    866         # linux_use_debug_fission: whether to use split DWARF debug info
    867         # files. This can reduce link time significantly, but is incompatible
    868         # with some utilities such as icecc and ccache. Requires gold and
    869         # gcc >= 4.8 or clang.
    870         # http://gcc.gnu.org/wiki/DebugFission
    871         ['OS=="linux" and target_arch=="x64"', {
    872           'linux_use_debug_fission%': 1,
    873         }, {
    874           'linux_use_debug_fission%': 0,
    875         }],
    876 
    877         ['OS=="android" or OS=="ios"', {
    878           'enable_captive_portal_detection%': 0,
    879         }, {
    880           'enable_captive_portal_detection%': 1,
    881         }],
    882 
    883         # Enable Skia UI text drawing incrementally on different platforms.
    884         # http://crbug.com/105550
    885         #
    886         # On Aura, this allows per-tile painting to be used in the browser
    887         # compositor.
    888         ['OS!="android"', {
    889           'use_canvas_skia%': 1,
    890         }],
    891 
    892         ['chromeos==1', {
    893           # When building for ChromeOS we dont want Chromium to use libjpeg_turbo.
    894           'use_libjpeg_turbo%': 0,
    895         }],
    896 
    897         # Do not enable the Settings App on ChromeOS.
    898         ['enable_app_list==1 and chromeos==0', {
    899           'enable_settings_app%': 1,
    900         }, {
    901           'enable_settings_app%': 0,
    902         }],
    903 
    904         ['OS=="linux" and target_arch=="arm" and chromeos==0', {
    905           # Set some defaults for arm/linux chrome builds
    906           'use_allocator%': 'none',
    907           # sysroot needs to be an absolute path otherwise it generates
    908           # incorrect results when passed to pkg-config
    909           'sysroot%': '<!(cd <(DEPTH) && pwd -P)/arm-sysroot',
    910         }], # OS=="linux" and target_arch=="arm" and chromeos==0
    911 
    912         ['OS=="linux" and branding=="Chrome" and buildtype=="Official" and chromeos==0', {
    913           'conditions': [
    914             ['target_arch=="x64"', {
    915               'sysroot%': '<!(cd <(DEPTH) && pwd -P)/chrome/installer/linux/debian_wheezy_amd64-sysroot',
    916             }],
    917             ['target_arch=="ia32"', {
    918               'sysroot%': '<!(cd <(DEPTH) && pwd -P)/chrome/installer/linux/debian_wheezy_i386-sysroot',
    919             }],
    920         ],
    921         }], # OS=="linux" and branding=="Chrome" and buildtype=="Official" and chromeos==0
    922 
    923         ['OS=="linux" and target_arch=="mipsel"', {
    924           'sysroot%': '<!(cd <(DEPTH) && pwd -P)/mipsel-sysroot/sysroot',
    925           'CXX%': '<!(cd <(DEPTH) && pwd -P)/mipsel-sysroot/bin/mipsel-linux-gnu-gcc',
    926         }],
    927 
    928         # Whether tests targets should be run, archived or just have the
    929         # dependencies verified. All the tests targets have the '_run' suffix,
    930         # e.g. base_unittests_run runs the target base_unittests. The test
    931         # target always calls tools/swarming_client/isolate.py. See the script's
    932         # --help for more information and the valid --mode values. Meant to be
    933         # overriden with GYP_DEFINES.
    934         # TODO(maruel): Remove the conditions as more configurations are
    935         # supported.
    936         # NOTE: The check for disable_nacl==0 and component=="static_library"
    937         # can't be used here because these variables are not defined yet, but it
    938         # is still not supported.
    939         ['OS!="ios" and OS!="android" and chromeos==0', {
    940           'test_isolation_mode%': 'check',
    941         }, {
    942           'test_isolation_mode%': 'noop',
    943         }],
    944         # Whether Android build uses OpenMAX DL FFT.
    945         ['OS=="android" and ((target_arch=="arm" and arm_version >= 7) or target_arch=="ia32" or target_arch=="x64" or target_arch=="arm64" or target_arch=="mipsel")', {
    946           # Currently only supported on Android ARMv7+, ARM64, ia32, x64 and mipsel.
    947           # When enabled, this will also enable WebAudio support on
    948           # Android for these architectures.  Default is enabled.  Whether
    949           # WebAudio is actually available depends on runtime settings
    950           # and flags.
    951           'use_openmax_dl_fft%': 1,
    952         }, {
    953           'use_openmax_dl_fft%': 0,
    954         }],
    955         ['OS=="win" or OS=="linux"', {
    956             'enable_mdns%' : 1,
    957         }],
    958 
    959         # Turns on compiler optimizations in V8 in Debug build, except
    960         # on android_clang, where we're hitting a weird linker error.
    961         # TODO(dpranke): http://crbug.com/266155 .
    962         ['OS=="android"', {
    963           'v8_optimized_debug%': 1,
    964         }, {
    965           'v8_optimized_debug%': 2,
    966         }],
    967 
    968         # Disable various features by default on embedded.
    969         ['embedded==1', {
    970           'remoting%': 0,
    971           'enable_printing%': 0,
    972         }],
    973 
    974         # By default, use ICU data file (icudtl.dat) on all platforms
    975         # except when building Android WebView or Chromecast.
    976         # TODO(jshin): Handle 'use_system_icu' on Linux (Chromium).
    977         # Set the data reduction proxy origin for Android Webview.
    978         ['android_webview_build==0 and android_webview_telemetry_build==0 and chromecast==0', {
    979           'icu_use_data_file_flag%' : 1,
    980           'spdy_proxy_auth_origin%': '',
    981           'data_reduction_proxy_probe_url%': '',
    982           'data_reduction_proxy_warmup_url%': '',
    983           'data_reduction_dev_host%': '',
    984           'data_reduction_dev_fallback_host%': '',
    985           'data_reduction_fallback_host%': '',
    986         }, {
    987           'icu_use_data_file_flag%' : 0,
    988           'spdy_proxy_auth_origin%': 'https://proxy.googlezip.net:443/',
    989           'data_reduction_proxy_probe_url%': 'http://check.googlezip.net/connect',
    990           'data_reduction_proxy_warmup_url%': 'http://www.gstatic.com/generate_204',
    991           'data_reduction_dev_host%': 'https://proxy-dev.googlezip.net:443/',
    992           'data_reduction_dev_fallback_host%': 'http://proxy-dev.googlezip.net:80/',
    993           'data_reduction_fallback_host%': 'http://compress.googlezip.net:80/',
    994         }],
    995         ['OS=="win" or OS=="mac"', {
    996             'enable_wifi_bootstrapping%' : 1,
    997         }],
    998 
    999         # Path to sas.dll, which provides the SendSAS function.
   1000         # http://msdn.microsoft.com/en-us/library/windows/desktop/dd979761(v=vs.85).aspx
   1001         ['target_arch=="x64"', {
   1002           'sas_dll_path%': '<(DEPTH)/third_party/platformsdk_win7/files/redist/amd64',
   1003         }, {
   1004           'sas_dll_path%': '<(DEPTH)/third_party/platformsdk_win7/files/redist/x86',
   1005         }],
   1006 
   1007         # Turn on JNI generation optimizations on non-WebView builds.
   1008         ['OS=="android" and android_webview_build==0', {
   1009           'optimize_jni_generation%': 1,
   1010         }, {
   1011           'optimize_jni_generation%': 0,
   1012         }],
   1013       ],
   1014 
   1015       # Set this to 1 to enable use of concatenated impulse responses
   1016       # for the HRTF panner in WebAudio.
   1017       'use_concatenated_impulse_responses': 1,
   1018 
   1019       # You can set the variable 'use_official_google_api_keys' to 1
   1020       # to use the Google-internal file containing official API keys
   1021       # for Google Chrome even in a developer build.  Setting this
   1022       # variable explicitly to 1 will cause your build to fail if the
   1023       # internal file is missing.
   1024       #
   1025       # The variable is documented here, but not handled in this file;
   1026       # see //google_apis/determine_use_official_keys.gypi for the
   1027       # implementation.
   1028       #
   1029       # Set the variable to 0 to not use the internal file, even when
   1030       # it exists in your checkout.
   1031       #
   1032       # Leave it unset in your include.gypi to have the variable
   1033       # implicitly set to 1 if you have
   1034       # src/google_apis/internal/google_chrome_api_keys.h in your
   1035       # checkout, and implicitly set to 0 if not.
   1036       #
   1037       # Note that official builds always behave as if the variable
   1038       # was explicitly set to 1, i.e. they always use official keys,
   1039       # and will fail to build if the internal file is missing.
   1040       #
   1041       # NOTE: You MUST NOT explicitly set the variable to 2 in your
   1042       # include.gypi or by other means. Due to subtleties of GYP, this
   1043       # is not the same as leaving the variable unset, even though its
   1044       # default value in
   1045       # //google_apis/determine_use_official_keys.gypi is 2.
   1046 
   1047       # Set these to bake the specified API keys and OAuth client
   1048       # IDs/secrets into your build.
   1049       #
   1050       # If you create a build without values baked in, you can instead
   1051       # set environment variables to provide the keys at runtime (see
   1052       # src/google_apis/google_api_keys.h for details).  Features that
   1053       # require server-side APIs may fail to work if no keys are
   1054       # provided.
   1055       #
   1056       # Note that if you are building an official build or if
   1057       # use_official_google_api_keys has been set to 1 (explicitly or
   1058       # implicitly), these values will be ignored and the official
   1059       # keys will be used instead.
   1060       'google_api_key%': '',
   1061       'google_default_client_id%': '',
   1062       'google_default_client_secret%': '',
   1063       # Native Client is enabled by default.
   1064       'disable_nacl%': '0',
   1065     },
   1066 
   1067     # Copy conditionally-set variables out one scope.
   1068     'branding%': '<(branding)',
   1069     'buildtype%': '<(buildtype)',
   1070     'target_arch%': '<(target_arch)',
   1071     'target_subarch%': '<(target_subarch)',
   1072     'mips_arch_variant%': '<(mips_arch_variant)',
   1073     'host_arch%': '<(host_arch)',
   1074     'toolkit_views%': '<(toolkit_views)',
   1075     'ui_compositor_image_transport%': '<(ui_compositor_image_transport)',
   1076     'use_aura%': '<(use_aura)',
   1077     'use_ash%': '<(use_ash)',
   1078     'use_cras%': '<(use_cras)',
   1079     'use_openssl%': '<(use_openssl)',
   1080     'use_openssl_certs%': '<(use_openssl_certs)',
   1081     'use_nss%': '<(use_nss)',
   1082     'use_udev%': '<(use_udev)',
   1083     'os_bsd%': '<(os_bsd)',
   1084     'os_posix%': '<(os_posix)',
   1085     'use_dbus%': '<(use_dbus)',
   1086     'use_glib%': '<(use_glib)',
   1087     'use_pango%': '<(use_pango)',
   1088     'use_cairo%': '<(use_cairo)',
   1089     'use_ozone%': '<(use_ozone)',
   1090     'use_ozone_evdev%': '<(use_ozone_evdev)',
   1091     'use_clipboard_aurax11%': '<(use_clipboard_aurax11)',
   1092     'desktop_linux%': '<(desktop_linux)',
   1093     'use_x11%': '<(use_x11)',
   1094     'use_gnome_keyring%': '<(use_gnome_keyring)',
   1095     'linux_fpic%': '<(linux_fpic)',
   1096     'chromeos%': '<(chromeos)',
   1097     'chromecast%': '<(chromecast)',
   1098     'enable_viewport%': '<(enable_viewport)',
   1099     'enable_hidpi%': '<(enable_hidpi)',
   1100     'use_xi2_mt%':'<(use_xi2_mt)',
   1101     'image_loader_extension%': '<(image_loader_extension)',
   1102     'fastbuild%': '<(fastbuild)',
   1103     'dont_embed_build_metadata%': '<(dont_embed_build_metadata)',
   1104     'win_z7%': '<(win_z7)',
   1105     'dcheck_always_on%': '<(dcheck_always_on)',
   1106     'tracing_like_official_build%': '<(tracing_like_official_build)',
   1107     'arm_version%': '<(arm_version)',
   1108     'arm_neon%': '<(arm_neon)',
   1109     'arm_neon_optional%': '<(arm_neon_optional)',
   1110     'sysroot%': '<(sysroot)',
   1111     'chroot_cmd%': '<(chroot_cmd)',
   1112     'system_libdir%': '<(system_libdir)',
   1113     'component%': '<(component)',
   1114     'enable_resource_whitelist_generation%': '<(enable_resource_whitelist_generation)',
   1115     'use_titlecase_in_grd%': '<(use_titlecase_in_grd)',
   1116     'use_third_party_translations%': '<(use_third_party_translations)',
   1117     'remoting%': '<(remoting)',
   1118     'enable_one_click_signin%': '<(enable_one_click_signin)',
   1119     'enable_pre_sync_backup%': '<(enable_pre_sync_backup)',
   1120     'enable_webrtc%': '<(enable_webrtc)',
   1121     'chromium_win_pch%': '<(chromium_win_pch)',
   1122     'configuration_policy%': '<(configuration_policy)',
   1123     'safe_browsing%': '<(safe_browsing)',
   1124     'enable_web_speech%': '<(enable_web_speech)',
   1125     'notifications%': '<(notifications)',
   1126     'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
   1127     'mac_want_real_dsym%': '<(mac_want_real_dsym)',
   1128     'asan%': '<(asan)',
   1129     'asan_coverage%': '<(asan_coverage)',
   1130     'use_sanitizer_options%': '<(use_sanitizer_options)',
   1131     'syzyasan%': '<(syzyasan)',
   1132     'syzygy_optimize%': '<(syzygy_optimize)',
   1133     'lsan%': '<(lsan)',
   1134     'msan%': '<(msan)',
   1135     'msan_blacklist%': '<(msan_blacklist)',
   1136     'msan_track_origins%': '<(msan_track_origins)',
   1137     'tsan%': '<(tsan)',
   1138     'tsan_blacklist%': '<(tsan_blacklist)',
   1139     'ubsan%': '<(ubsan)',
   1140     'ubsan_vptr%': '<(ubsan_vptr)',
   1141     'ubsan_vptr_blacklist%': '<(ubsan_vptr_blacklist)',
   1142     'use_instrumented_libraries%': '<(use_instrumented_libraries)',
   1143     'use_custom_libcxx%': '<(use_custom_libcxx)',
   1144     'use_system_libcxx%': '<(use_system_libcxx)',
   1145     'clang_type_profiler%': '<(clang_type_profiler)',
   1146     'order_profiling%': '<(order_profiling)',
   1147     'order_text_section%': '<(order_text_section)',
   1148     'enable_extensions%': '<(enable_extensions)',
   1149     'enable_plugin_installation%': '<(enable_plugin_installation)',
   1150     'enable_plugins%': '<(enable_plugins)',
   1151     'enable_session_service%': '<(enable_session_service)',
   1152     'enable_themes%': '<(enable_themes)',
   1153     'enable_autofill_dialog%': '<(enable_autofill_dialog)',
   1154     'enable_prod_wallet_service%': '<(enable_prod_wallet_service)',
   1155     'enable_background%': '<(enable_background)',
   1156     'linux_use_bundled_gold%': '<(linux_use_bundled_gold)',
   1157     'linux_use_bundled_binutils%': '<(linux_use_bundled_binutils)',
   1158     'linux_use_gold_flags%': '<(linux_use_gold_flags)',
   1159     'linux_use_debug_fission%': '<(linux_use_debug_fission)',
   1160     'use_canvas_skia%': '<(use_canvas_skia)',
   1161     'test_isolation_mode%': '<(test_isolation_mode)',
   1162     'test_isolation_outdir%': '<(test_isolation_outdir)',
   1163     'test_isolation_fail_on_missing': '<(test_isolation_fail_on_missing)',
   1164     'enable_printing%': '<(enable_printing)',
   1165     'enable_spellcheck%': '<(enable_spellcheck)',
   1166     'enable_google_now%': '<(enable_google_now)',
   1167     'cld_version%': '<(cld_version)',
   1168     'cld2_table_size%': '<(cld2_table_size)',
   1169     'cld2_data_source%': '<(cld2_data_source)',
   1170     'enable_captive_portal_detection%': '<(enable_captive_portal_detection)',
   1171     'disable_file_support%': '<(disable_file_support)',
   1172     'disable_ftp_support%': '<(disable_ftp_support)',
   1173     'use_icu_alternatives_on_android%': '<(use_icu_alternatives_on_android)',
   1174     'enable_task_manager%': '<(enable_task_manager)',
   1175     'sas_dll_path%': '<(sas_dll_path)',
   1176     'wix_path%': '<(wix_path)',
   1177     'use_libjpeg_turbo%': '<(use_libjpeg_turbo)',
   1178     'use_system_libjpeg%': '<(use_system_libjpeg)',
   1179     'android_webview_build%': '<(android_webview_build)',
   1180     'android_webview_telemetry_build%': '<(android_webview_telemetry_build)',
   1181     'icu_use_data_file_flag%': '<(icu_use_data_file_flag)',
   1182     'gyp_managed_install%': 0,
   1183     'create_standalone_apk%': 1,
   1184     'enable_app_list%': '<(enable_app_list)',
   1185     'use_default_render_theme%': '<(use_default_render_theme)',
   1186     'enable_settings_app%': '<(enable_settings_app)',
   1187     'google_api_key%': '<(google_api_key)',
   1188     'google_default_client_id%': '<(google_default_client_id)',
   1189     'google_default_client_secret%': '<(google_default_client_secret)',
   1190     'enable_managed_users%': '<(enable_managed_users)',
   1191     'native_discardable_memory%': '<(native_discardable_memory)',
   1192     'native_memory_pressure_signals%': '<(native_memory_pressure_signals)',
   1193     'data_reduction_fallback_host%': '<(data_reduction_fallback_host)',
   1194     'data_reduction_dev_host%': '<(data_reduction_dev_host)',
   1195     'data_reduction_dev_fallback_host%': '<(data_reduction_dev_fallback_host)',
   1196     'spdy_proxy_auth_origin%': '<(spdy_proxy_auth_origin)',
   1197     'spdy_proxy_auth_property%': '<(spdy_proxy_auth_property)',
   1198     'spdy_proxy_auth_value%': '<(spdy_proxy_auth_value)',
   1199     'data_reduction_proxy_probe_url%': '<(data_reduction_proxy_probe_url)',
   1200     'data_reduction_proxy_warmup_url%': '<(data_reduction_proxy_warmup_url)',
   1201     'data_reduction_proxy_ssl_origin%' : '<(data_reduction_proxy_ssl_origin)',
   1202     'data_reduction_proxy_alt_origin%' : '<(data_reduction_proxy_alt_origin)',
   1203     'data_reduction_proxy_alt_fallback_origin%' : '<(data_reduction_proxy_alt_fallback_origin)',
   1204     'enable_mdns%' : '<(enable_mdns)',
   1205     'enable_service_discovery%' : '<(enable_service_discovery)',
   1206     'enable_wifi_bootstrapping%': '<(enable_wifi_bootstrapping)',
   1207     'enable_hangout_services_extension%' : '<(enable_hangout_services_extension)',
   1208     'v8_optimized_debug%': '<(v8_optimized_debug)',
   1209     'proprietary_codecs%': '<(proprietary_codecs)',
   1210     'use_goma%': '<(use_goma)',
   1211     'gomadir%': '<(gomadir)',
   1212     'video_hole%': '<(video_hole)',
   1213     'enable_load_completion_hacks%': '<(enable_load_completion_hacks)',
   1214 
   1215     # Whether or not we are building the Athena shell.
   1216     'use_athena%': '0',
   1217 
   1218     # Use system protobuf instead of bundled one.
   1219     'use_system_protobuf%': 0,
   1220 
   1221     # Use system yasm instead of bundled one.
   1222     'use_system_yasm%': 0,
   1223 
   1224     # Use system ICU instead of bundled one.
   1225     'use_system_icu%' : 0,
   1226 
   1227     # Default to enabled PIE; this is important for ASLR but we may need to be
   1228     # able to turn it off for various reasons.
   1229     'linux_disable_pie%': 0,
   1230 
   1231     # The release channel that this build targets. This is used to restrict
   1232     # channel-specific build options, like which installer packages to create.
   1233     # The default is 'all', which does no channel-specific filtering.
   1234     'channel%': 'all',
   1235 
   1236     # Override chromium_mac_pch and set it to 0 to suppress the use of
   1237     # precompiled headers on the Mac.  Prefix header injection may still be
   1238     # used, but prefix headers will not be precompiled.  This is useful when
   1239     # using distcc to distribute a build to compile slaves that don't
   1240     # share the same compiler executable as the system driving the compilation,
   1241     # because precompiled headers rely on pointers into a specific compiler
   1242     # executable's image.  Setting this to 0 is needed to use an experimental
   1243     # Linux-Mac cross compiler distcc farm.
   1244     'chromium_mac_pch%': 1,
   1245 
   1246     # The default value for mac_strip in target_defaults. This cannot be
   1247     # set there, per the comment about variable% in a target_defaults.
   1248     'mac_strip_release%': 0,
   1249 
   1250     # Set to 1 to enable java code coverage. Instruments classes during build
   1251     # to produce .ec files during runtime.
   1252     'emma_coverage%': 0,
   1253 
   1254     # EMMA filter string consisting of a list of inclusion/exclusion patterns
   1255     # separated with whitespace and/or comma. Only has effect if
   1256     # 'emma_coverage=1'.
   1257     'emma_filter%': '',
   1258 
   1259     # Set to 1 to enable running Android lint on java/class files.
   1260     'android_lint%': 1,
   1261 
   1262     # Although base/allocator lets you select a heap library via an
   1263     # environment variable, the libcmt shim it uses sometimes gets in
   1264     # the way.  To disable it entirely, and switch to normal msvcrt, do e.g.
   1265     #  'win_use_allocator_shim': 0,
   1266     #  'win_release_RuntimeLibrary': 2
   1267     # to ~/.gyp/include.gypi, gclient runhooks --force, and do a release build.
   1268     'win_use_allocator_shim%': 1, # 1 = shim allocator via libcmt; 0 = msvcrt
   1269 
   1270     # TODO(bradnelson): eliminate this when possible.
   1271     # To allow local gyp files to prevent release.vsprops from being included.
   1272     # Yes(1) means include release.vsprops.
   1273     # Once all vsprops settings are migrated into gyp, this can go away.
   1274     'msvs_use_common_release%': 1,
   1275 
   1276     # TODO(bradnelson): eliminate this when possible.
   1277     # To allow local gyp files to override additional linker options for msvs.
   1278     # Yes(1) means set use the common linker options.
   1279     'msvs_use_common_linker_extras%': 1,
   1280 
   1281     # TODO(sgk): eliminate this if possible.
   1282     # It would be nicer to support this via a setting in 'target_defaults'
   1283     # in chrome/app/locales/locales.gypi overriding the setting in the
   1284     # 'Debug' configuration in the 'target_defaults' dict below,
   1285     # but that doesn't work as we'd like.
   1286     'msvs_debug_link_incremental%': '2',
   1287 
   1288     # Needed for some of the largest modules.
   1289     'msvs_debug_link_nonincremental%': '1',
   1290 
   1291     # Turns on Use Library Dependency Inputs for linking chrome.dll on Windows
   1292     # to get incremental linking to be faster in debug builds.
   1293     'incremental_chrome_dll%': '0',
   1294 
   1295     # Experimental setting to break chrome.dll into multiple pieces based on
   1296     # process type.
   1297     'chrome_multiple_dll%': '0',
   1298 
   1299     # Experimental setting to optimize Chrome's DLLs with PGO.
   1300     'chrome_pgo_phase%': '0',
   1301 
   1302     # Clang stuff.
   1303     'clang%': '<(clang)',
   1304     'host_clang%': '<(host_clang)',
   1305     'make_clang_dir%': '<(make_clang_dir)',
   1306 
   1307     # Control which version of clang to use when building for iOS.  If set to
   1308     # '1', uses the version of clang that ships with Xcode.  If set to '0', uses
   1309     # the version of clang that ships with the Chromium source.  This variable
   1310     # is automatically set to '1' when using the Xcode generator.
   1311     'clang_xcode%': 0,
   1312 
   1313     # These two variables can be set in GYP_DEFINES while running
   1314     # |gclient runhooks| to let clang run a plugin in every compilation.
   1315     # Only has an effect if 'clang=1' is in GYP_DEFINES as well.
   1316     # Example:
   1317     #     GYP_DEFINES='clang=1 clang_load=/abs/path/to/libPrintFunctionNames.dylib clang_add_plugin=print-fns' gclient runhooks
   1318 
   1319     'clang_load%': '',
   1320     'clang_add_plugin%': '',
   1321 
   1322     # Tell ld64 to write map files describing binary layout. Useful
   1323     # for looking at what contributes to binary size, e.g. with
   1324     # https://github.com/nico/bloat
   1325     'mac_write_linker_maps%': 0,
   1326 
   1327     # The default type of gtest.
   1328     'gtest_target_type%': 'executable',
   1329 
   1330     # Enable sampling based profiler.
   1331     # See http://google-perftools.googlecode.com/svn/trunk/doc/cpuprofile.html
   1332     'profiling%': '0',
   1333     # Profile without optimizing out stack frames when profiling==1.
   1334     'profiling_full_stack_frames%': '0',
   1335 
   1336     # And if we want to dump symbols for Breakpad-enabled builds.
   1337     'linux_dump_symbols%': 0,
   1338     # And if we want to strip the binary after dumping symbols.
   1339     'linux_strip_binary%': 0,
   1340     # If we want stack unwind support for backtrace().
   1341     'debug_unwind_tables%': 1,
   1342     'release_unwind_tables%': 1,
   1343 
   1344     # Override where to find binutils
   1345     'binutils_version%': 0,
   1346     'binutils_dir%': '',
   1347 
   1348     # Enable TCMalloc.
   1349     # Default of 'use_allocator' is set to 'none' if OS=='android' later.
   1350     'use_allocator%': 'tcmalloc',
   1351 
   1352     # Set to 1 to link against libgnome-keyring instead of using dlopen().
   1353     'linux_link_gnome_keyring%': 0,
   1354     # Set to 1 to link against gsettings APIs instead of using dlopen().
   1355     'linux_link_gsettings%': 0,
   1356 
   1357     # Enable use of OpenMAX DL FFT routines.
   1358     'use_openmax_dl_fft%': '<(use_openmax_dl_fft)',
   1359 
   1360     # Enable new NPDevice API.
   1361     'enable_new_npdevice_api%': 0,
   1362 
   1363     # Enable EGLImage support in OpenMAX
   1364     'enable_eglimage%': 1,
   1365 
   1366     # .gyp files or targets should set chromium_code to 1 if they build
   1367     # Chromium-specific code, as opposed to external code.  This variable is
   1368     # used to control such things as the set of warnings to enable, and
   1369     # whether warnings are treated as errors.
   1370     'chromium_code%': 0,
   1371 
   1372     # Disable fatal linker warnings, similarly to how we make it possible
   1373     # to disable -Werror (e.g. for different toolchain versions).
   1374     'disable_fatal_linker_warnings%': 0,
   1375 
   1376     'release_valgrind_build%': 0,
   1377 
   1378     # TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
   1379     'enable_wexit_time_destructors%': 0,
   1380 
   1381     # Build libpeerconnection as a static library by default.
   1382     'libpeer_target_type%': 'static_library',
   1383 
   1384     # Set to 1 to compile with the OpenGL ES 2.0 conformance tests.
   1385     'internal_gles2_conform_tests%': 0,
   1386 
   1387     # Set to 1 to compile the filter fuzzer.
   1388     'internal_filter_fuzzer%': 0,
   1389 
   1390     # NOTE: When these end up in the Mac bundle, we need to replace '-' for '_'
   1391     # so Cocoa is happy (http://crbug.com/20441).
   1392     'locales': [
   1393       'am', 'ar', 'bg', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en-GB',
   1394       'en-US', 'es-419', 'es', 'et', 'fa', 'fi', 'fil', 'fr', 'gu', 'he',
   1395       'hi', 'hr', 'hu', 'id', 'it', 'ja', 'kn', 'ko', 'lt', 'lv',
   1396       'ml', 'mr', 'ms', 'nb', 'nl', 'pl', 'pt-BR', 'pt-PT', 'ro', 'ru',
   1397       'sk', 'sl', 'sr', 'sv', 'sw', 'ta', 'te', 'th', 'tr', 'uk',
   1398       'vi', 'zh-CN', 'zh-TW',
   1399     ],
   1400 
   1401     # Pseudo locales are special locales which are used for testing and
   1402     # debugging. They don't get copied to the final app. For more info,
   1403     # check out https://sites.google.com/a/chromium.org/dev/Home/fake-bidi
   1404     'pseudo_locales': [
   1405       'fake-bidi',
   1406     ],
   1407 
   1408     'grit_defines': [],
   1409 
   1410     # If debug_devtools is set to 1, JavaScript files for DevTools are
   1411     # stored as is and loaded from disk. Otherwise, a concatenated file
   1412     # is stored in resources.pak. It is still possible to load JS files
   1413     # from disk by passing --debug-devtools cmdline switch.
   1414     'debug_devtools%': 0,
   1415 
   1416     # The Java Bridge is not compiled in by default.
   1417     'java_bridge%': 0,
   1418 
   1419     # Code signing for iOS binaries.  The bots need to be able to disable this.
   1420     'chromium_ios_signing%': 1,
   1421 
   1422     # This flag is only used when disable_nacl==0 and disables all those
   1423     # subcomponents which would require the installation of a native_client
   1424     # untrusted toolchain.
   1425     'disable_nacl_untrusted%': 0,
   1426 
   1427     # Disable Dart by default.
   1428     'enable_dart%': 0,
   1429 
   1430     # Copy out the setting of disable_nacl.
   1431     'disable_nacl%': '<(disable_nacl)',
   1432 
   1433     # Portable Native Client is enabled by default.
   1434     'disable_pnacl%': 0,
   1435 
   1436     # Whether to build full debug version for Debug configuration on Android.
   1437     # Compared to full debug version, the default Debug configuration on Android
   1438     # has no full v8 debug, has size optimization and linker gc section, so that
   1439     # we can build a debug version with acceptable size and performance.
   1440     'android_full_debug%': 0,
   1441 
   1442     # Sets the default version name and code for Android app, by default we
   1443     # do a developer build.
   1444     'android_app_version_name%': 'Developer Build',
   1445     'android_app_version_code%': 0,
   1446 
   1447     # Contains data about the attached devices for gyp_managed_install.
   1448     'build_device_config_path': '<(PRODUCT_DIR)/build_devices.cfg',
   1449 
   1450     'sas_dll_exists': '<!pymod_do_main(dir_exists "<(sas_dll_path)")',
   1451     'wix_exists': '<!pymod_do_main(dir_exists "<(wix_path)")',
   1452 
   1453     'windows_sdk_default_path': '<(DEPTH)/third_party/platformsdk_win8/files',
   1454     'directx_sdk_default_path': '<(DEPTH)/third_party/directxsdk/files',
   1455 
   1456     # Whether we are using the rlz library or not.  Platforms like Android send
   1457     # rlz codes for searches but do not use the library.
   1458     'enable_rlz%': 0,
   1459 
   1460     # Turns on the i18n support in V8.
   1461     'v8_enable_i18n_support': 1,
   1462 
   1463     # Compile d8 for the host toolset.
   1464     'v8_toolset_for_d8': 'host',
   1465 
   1466     # Use the chromium skia by default.
   1467     'use_system_skia%': '0',
   1468 
   1469     # Use brlapi from brltty for braille display support.
   1470     'use_brlapi%': 0,
   1471 
   1472     # Relative path to icu.gyp from this file.
   1473     'icu_gyp_path': '../third_party/icu/icu.gyp',
   1474 
   1475     # IPC fuzzer is disabled by default.
   1476     'enable_ipc_fuzzer%': 0,
   1477 
   1478 
   1479     # Force disable libstdc++ debug mode.
   1480     'disable_glibcxx_debug%': 0,
   1481 
   1482     # Set to 1 to compile with MSE support for MPEG2 TS
   1483     'enable_mpeg2ts_stream_parser%': 0,
   1484 
   1485     # Support ChromeOS touchpad gestures with ozone.
   1486     'use_evdev_gestures%': 0,
   1487 
   1488     # Default ozone platform (if no --ozone-platform flag).
   1489     'ozone_platform%': "",
   1490 
   1491     # Ozone platforms to include in the build.
   1492     'ozone_platform_caca%': 0,
   1493     'ozone_platform_dri%': 0,
   1494     'ozone_platform_egltest%': 0,
   1495     'ozone_platform_gbm%': 0,
   1496     'ozone_platform_ozonex%': 0,
   1497     'ozone_platform_test%': 0,
   1498 
   1499     # Chrome OS: whether to build ChromeVox from sources in the Chromium
   1500     # repository rather than using precompiled JavaScript in
   1501     # chrome/third_party/chromevox.  This is still experimental.
   1502     'use_migrated_chromevox%': 1,
   1503 
   1504     'conditions': [
   1505       # Enable the Syzygy optimization step for the official builds.
   1506       ['OS=="win" and buildtype=="Official" and syzyasan!=1', {
   1507         'syzygy_optimize%': 1,
   1508       }, {
   1509         'syzygy_optimize%': 0,
   1510       }],
   1511       # Get binutils version so we can enable debug fission if we can.
   1512       ['os_posix==1 and OS!="mac" and OS!="ios"', {
   1513         'conditions': [
   1514           # compiler_version doesn't work with clang
   1515           # TODO(mithro): Land https://codereview.chromium.org/199793014/ so
   1516           # compiler_version works with clang.
   1517           # TODO(glider): set clang to 1 earlier for ASan and TSan builds so
   1518           # that it takes effect here.
   1519           ['clang==0 and asan==0 and lsan==0 and tsan==0 and msan==0 and ubsan==0 and ubsan_vptr==0', {
   1520             'binutils_version%': '<!pymod_do_main(compiler_version target assembler)',
   1521           }],
   1522           # On Android we know the binutils version in the toolchain.
   1523           ['OS=="android"', {
   1524             'binutils_version%': 222,
   1525           }],
   1526           ['host_arch=="x64"', {
   1527             'binutils_dir%': 'third_party/binutils/Linux_x64/Release/bin',
   1528           }],
   1529           ['host_arch=="ia32"', {
   1530             'binutils_dir%': 'third_party/binutils/Linux_ia32/Release/bin',
   1531           }],
   1532           # Our version of binutils in third_party/binutils
   1533           ['linux_use_bundled_binutils==1', {
   1534             'binutils_version%': 224,
   1535           }],
   1536         ],
   1537       }, {
   1538         'binutils_version%': 0,
   1539       }],
   1540       # The version of GCC in use, set later in platforms that use GCC and have
   1541       # not explicitly chosen to build with clang. Currently, this means all
   1542       # platforms except Windows, Mac and iOS.
   1543       # TODO(glider): set clang to 1 earlier for ASan and TSan builds so that
   1544       # it takes effect here.
   1545       ['os_posix==1 and OS!="mac" and OS!="ios" and clang==0 and asan==0 and lsan==0 and tsan==0 and msan==0 and ubsan_vptr==0', {
   1546         'conditions': [
   1547           ['OS=="android" and android_webview_build==0', {
   1548             'host_gcc_version%': '<!pymod_do_main(compiler_version host compiler)',
   1549             # We directly set the gcc version since we know what we use.
   1550             'gcc_version%': 49,
   1551           }],
   1552           ['OS=="android" and android_webview_build==1', {
   1553             # Android WebView uses a hermetic clang toolchain for host builds.
   1554             'host_gcc_version%': 0,
   1555             # Android WebView uses the GCC toolchain from the Android build.
   1556             'gcc_version%': 48,
   1557           }],
   1558           ['OS!="android"', {
   1559             'host_gcc_version%': '<!pymod_do_main(compiler_version host compiler)',
   1560             'gcc_version%': '<!pymod_do_main(compiler_version target compiler)',
   1561           }],
   1562         ],
   1563       }, {
   1564         'host_gcc_version%': 0,
   1565         'gcc_version%': 0,
   1566       }],
   1567       ['OS=="win" and "<!pymod_do_main(dir_exists <(windows_sdk_default_path))"=="True"', {
   1568         'windows_sdk_path%': '<(windows_sdk_default_path)',
   1569       }, {
   1570         'windows_sdk_path%': 'C:/Program Files (x86)/Windows Kits/8.0',
   1571       }],
   1572       ['OS=="win" and "<!pymod_do_main(dir_exists <(directx_sdk_default_path))"=="True"', {
   1573         'directx_sdk_path%': '<(directx_sdk_default_path)',
   1574       }, {
   1575         'directx_sdk_path%': '$(DXSDK_DIR)',
   1576       }],
   1577       ['OS=="win"', {
   1578         'windows_driver_kit_path%': '$(WDK_DIR)',
   1579       }],
   1580       ['os_posix==1 and OS!="mac" and OS!="ios"', {
   1581         'conditions': [
   1582           ['target_arch=="mipsel" or target_arch=="mips64el"', {
   1583             'werror%': '',
   1584             'disable_nacl%': 1,
   1585             'nacl_untrusted_build%': 0,
   1586             'use_allocator%': 'none',
   1587           }],
   1588           ['OS=="linux" and target_arch=="mipsel"', {
   1589             'sysroot%': '<(sysroot)',
   1590             'CXX%': '<(CXX)',
   1591           }],
   1592           # All Chrome builds have breakpad symbols, but only process the
   1593           # symbols from official builds.
   1594           ['(branding=="Chrome" and buildtype=="Official")', {
   1595             'linux_dump_symbols%': 1,
   1596 
   1597             # Omit unwind support in official release builds to save space. We
   1598             # can use breakpad for these builds.
   1599             'release_unwind_tables%': 0,
   1600 
   1601             'conditions': [
   1602               # For official builds, use a 64-bit linker to avoid running out
   1603               # of address space. The buildbots should have a 64-bit kernel
   1604               # and a 64-bit libc installed.
   1605               ['host_arch=="ia32" and target_arch=="ia32"', {
   1606                 'linux_use_bundled_gold%': '1',
   1607                 'binutils_dir%': 'third_party/binutils/Linux_x64/Release/bin',
   1608               }],
   1609             ],
   1610           }],
   1611         ],
   1612       }],  # os_posix==1 and OS!="mac" and OS!="ios"
   1613       ['OS=="ios"', {
   1614         'disable_nacl%': 1,
   1615         'enable_background%': 0,
   1616         'icu_use_data_file_flag%': 1,
   1617         'enable_web_speech%': 0,
   1618         'use_system_libxml%': 1,
   1619         'use_system_sqlite%': 1,
   1620         'locales==': [
   1621           'ar', 'ca', 'cs', 'da', 'de', 'el', 'en-GB', 'en-US', 'es', 'es-MX',
   1622           'fi', 'fr', 'he', 'hi', 'hr', 'hu', 'id', 'it', 'ja', 'ko', 'ms',
   1623           'nb', 'nl', 'pl', 'pt', 'pt-PT', 'ro', 'ru', 'sk', 'sv', 'th', 'tr',
   1624           'uk', 'vi', 'zh-CN', 'zh-TW',
   1625         ],
   1626 
   1627         # The Mac SDK is set for iOS builds and passed through to Mac
   1628         # sub-builds. This allows the Mac sub-build SDK in an iOS build to be
   1629         # overridden from the command line the same way it is for a Mac build.
   1630         'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py 10.6)',
   1631 
   1632         # iOS SDK and deployment target support.  The |ios_sdk| value is left
   1633         # blank so that when it is set in the project files it will be the
   1634         # "current" iOS SDK.  Forcing a specific SDK even if it is "current"
   1635         # causes Xcode to spit out a warning for every single project file for
   1636         # not using the "current" SDK.
   1637         'ios_sdk%': '',
   1638         'ios_sdk_path%': '',
   1639         'ios_deployment_target%': '7.0',
   1640 
   1641         'conditions': [
   1642           # ios_product_name is set to the name of the .app bundle as it should
   1643           # appear on disk.
   1644           ['branding=="Chrome"', {
   1645             'ios_product_name%': 'Chrome',
   1646           }, { # else: branding!="Chrome"
   1647             'ios_product_name%': 'Chromium',
   1648           }],
   1649           ['branding=="Chrome" and buildtype=="Official"', {
   1650             'ios_breakpad%': 1,
   1651           }, { # else: branding!="Chrome" or buildtype!="Official"
   1652             'ios_breakpad%': 0,
   1653           }],
   1654         ],
   1655       }],  # OS=="ios"
   1656       ['OS=="android"', {
   1657         # Location of Android NDK.
   1658         'variables': {
   1659           'variables': {
   1660             # Unfortunately we have to use absolute paths to the SDK/NDK because
   1661             # they're passed to ant which uses a different relative path from
   1662             # gyp.
   1663             'android_ndk_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/ndk/',
   1664             'android_sdk_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/sdk/',
   1665             'android_host_arch%': '<!(uname -m)',
   1666             # Android API-level of the SDK used for compilation.
   1667             'android_sdk_version%': '20',
   1668             'android_sdk_build_tools_version%': '20.0.0',
   1669             'host_os%': "<!(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')",
   1670           },
   1671           # Copy conditionally-set variables out one scope.
   1672           'android_ndk_root%': '<(android_ndk_root)',
   1673           'android_sdk_root%': '<(android_sdk_root)',
   1674           'android_sdk_version%': '<(android_sdk_version)',
   1675           'android_stlport_root': '<(android_ndk_root)/sources/cxx-stl/stlport',
   1676           'host_os%': '<(host_os)',
   1677 
   1678           'android_sdk%': '<(android_sdk_root)/platforms/android-<(android_sdk_version)',
   1679           # Android SDK build tools (e.g. dx, aapt, aidl)
   1680           'android_sdk_tools%': '<(android_sdk_root)/build-tools/<(android_sdk_build_tools_version)',
   1681 
   1682           # Android API level 14 is ICS (Android 4.0) which is the minimum
   1683           # platform requirement for Chrome on Android, we use it for native
   1684           # code compilation.
   1685           'conditions': [
   1686             ['target_arch == "ia32"', {
   1687               'android_app_abi%': 'x86',
   1688               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-x86/gdbserver/gdbserver',
   1689               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-14/arch-x86',
   1690               'android_ndk_lib_dir%': 'usr/lib',
   1691               'android_toolchain%': '<(android_ndk_root)/toolchains/x86-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
   1692             }],
   1693             ['target_arch == "x64"', {
   1694               'android_app_abi%': 'x86_64',
   1695               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-x86_64/gdbserver/gdbserver',
   1696               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-L/arch-x86_64',
   1697               'android_ndk_lib_dir%': 'usr/lib64',
   1698               'android_toolchain%': '<(android_ndk_root)/toolchains/x86_64-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
   1699             }],
   1700             ['target_arch=="arm"', {
   1701               'conditions': [
   1702                 ['arm_version<7', {
   1703                   'android_app_abi%': 'armeabi',
   1704                 }, {
   1705                   'android_app_abi%': 'armeabi-v7a',
   1706                 }],
   1707               ],
   1708               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-arm/gdbserver/gdbserver',
   1709               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-14/arch-arm',
   1710               'android_ndk_lib_dir%': 'usr/lib',
   1711               'android_toolchain%': '<(android_ndk_root)/toolchains/arm-linux-androideabi-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
   1712             }],
   1713             ['target_arch == "arm64"', {
   1714               'android_app_abi%': 'arm64-v8a',
   1715               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-arm64/gdbserver/gdbserver',
   1716               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-L/arch-arm64',
   1717               'android_ndk_lib_dir%': 'usr/lib',
   1718               'android_toolchain%': '<(android_ndk_root)/toolchains/aarch64-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
   1719             }],
   1720             ['target_arch == "mipsel"', {
   1721               'android_app_abi%': 'mips',
   1722               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-mips/gdbserver/gdbserver',
   1723               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-14/arch-mips',
   1724               'android_ndk_lib_dir%': 'usr/lib',
   1725               'android_toolchain%': '<(android_ndk_root)/toolchains/mipsel-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
   1726             }],
   1727             ['target_arch == "mips64el"', {
   1728               'android_app_abi%': 'mips64',
   1729               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-mips64/gdbserver/gdbserver',
   1730               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-L/arch-mips64',
   1731               'android_ndk_lib_dir%': 'usr/lib64',
   1732               'android_toolchain%': '<(android_ndk_root)/toolchains/mips64el-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
   1733               'gcc_version%': 49,
   1734             }],
   1735           ],
   1736         },
   1737         # Copy conditionally-set variables out one scope.
   1738         'android_app_abi%': '<(android_app_abi)',
   1739         'android_gdbserver%': '<(android_gdbserver)',
   1740         'android_ndk_root%': '<(android_ndk_root)',
   1741         'android_ndk_sysroot%': '<(android_ndk_sysroot)',
   1742         'android_sdk_root%': '<(android_sdk_root)',
   1743         'android_sdk_version%': '<(android_sdk_version)',
   1744         'android_toolchain%': '<(android_toolchain)',
   1745 
   1746         'android_ndk_include': '<(android_ndk_sysroot)/usr/include',
   1747         'android_ndk_lib': '<(android_ndk_sysroot)/<(android_ndk_lib_dir)',
   1748         'android_sdk_tools%': '<(android_sdk_tools)',
   1749         'android_sdk%': '<(android_sdk)',
   1750         'android_sdk_jar%': '<(android_sdk)/android.jar',
   1751 
   1752         'android_stlport_root': '<(android_stlport_root)',
   1753         'android_stlport_include': '<(android_stlport_root)/stlport',
   1754         'android_stlport_libs_dir': '<(android_stlport_root)/libs/<(android_app_abi)',
   1755         'host_os%': '<(host_os)',
   1756 
   1757         # Location of the "objcopy" binary, used by both gyp and scripts.
   1758         'android_objcopy%' : '<!(/bin/echo -n <(android_toolchain)/*-objcopy)',
   1759 
   1760         # Location of the "strip" binary, used by both gyp and scripts.
   1761         'android_strip%' : '<!(/bin/echo -n <(android_toolchain)/*-strip)',
   1762 
   1763         # Location of the "readelf" binary.
   1764         'android_readelf%' : '<!(/bin/echo -n <(android_toolchain)/*-readelf)',
   1765 
   1766         # Determines whether we should optimize JNI generation at the cost of
   1767         # breaking assumptions in the build system that when inputs have changed
   1768         # the outputs should always change as well.  This is meant purely for
   1769         # developer builds, to avoid spurious re-linking of native files.
   1770         'optimize_jni_generation%': '<(optimize_jni_generation)',
   1771 
   1772         # Always uses openssl.
   1773         'use_openssl%': 1,
   1774         'use_openssl_certs%': 1,
   1775 
   1776         'proprietary_codecs%': '<(proprietary_codecs)',
   1777         'safe_browsing%': 1,
   1778         'enable_web_speech%': 0,
   1779         'java_bridge%': 1,
   1780         'build_ffmpegsumo%': 0,
   1781         'use_allocator%': 'none',
   1782 
   1783         # Disable Native Client.
   1784         'disable_nacl%': 1,
   1785 
   1786         # Android does not support background apps.
   1787         'enable_background%': 0,
   1788 
   1789         # Sessions are store separately in the Java side.
   1790         'enable_session_service%': 0,
   1791 
   1792         'p2p_apis%' : 0,
   1793 
   1794         'gtest_target_type%': 'shared_library',
   1795 
   1796         # Uses system APIs for decoding audio and video.
   1797         'use_libffmpeg%': '0',
   1798 
   1799         # When building as part of the Android system, use system libraries
   1800         # where possible to reduce ROM size.
   1801         'use_system_icu%': '<(android_webview_build)',
   1802         'use_system_stlport%': '<(android_webview_build)',
   1803 
   1804         # Copy it out one scope.
   1805         'android_webview_build%': '<(android_webview_build)',
   1806 
   1807         # Default android linker script for shared library exports.
   1808         'android_linker_script%': '<(SHARED_INTERMEDIATE_DIR)/android_exports.lst',
   1809       }],  # OS=="android"
   1810       ['embedded==1', {
   1811         'use_system_fontconfig%': 0,
   1812       }, {
   1813         'use_system_fontconfig%': 1,
   1814       }],
   1815       ['chromecast==1', {
   1816         'enable_mpeg2ts_stream_parser%': 1,
   1817         'ffmpeg_branding%': 'Chrome',
   1818         'ozone_platform_ozonex%': 1,
   1819         'use_playready%': 0,
   1820         'conditions': [
   1821           ['target_arch=="arm"', {
   1822             'arm_arch%': '',
   1823             'arm_tune%': 'cortex-a9',
   1824             'arm_thumb%': 1,
   1825             'video_hole%': 1,
   1826           }],
   1827         ],
   1828       }],
   1829       ['android_webview_build==1', {
   1830         # When building the WebView in the Android tree, jarjar will remap all
   1831         # the class names, so the JNI generator needs to know this.
   1832         'jni_generator_jarjar_file': '../android_webview/build/jarjar-rules.txt',
   1833       }],
   1834       ['OS=="linux" and target_arch!="mipsel"', {
   1835         # TODO(thakis): This is here to measure perf for a while.
   1836         'clang%': 1,
   1837       }],  # OS=="mac"
   1838       ['OS=="mac"', {
   1839         'conditions': [
   1840           # All Chrome builds have breakpad symbols, but only process the
   1841           # symbols from official builds.
   1842           ['(branding=="Chrome" and buildtype=="Official")', {
   1843             'mac_strip_release%': 1,
   1844           }],
   1845         ],
   1846       }],  # OS=="mac"
   1847       ['OS=="mac" or OS=="ios"', {
   1848         'clang%': 1,
   1849 
   1850         'variables': {
   1851           # Mac OS X SDK and deployment target support.  The SDK identifies
   1852           # the version of the system headers that will be used, and
   1853           # corresponds to the MAC_OS_X_VERSION_MAX_ALLOWED compile-time
   1854           # macro.  "Maximum allowed" refers to the operating system version
   1855           # whose APIs are available in the headers.  The deployment target
   1856           # identifies the minimum system version that the built products are
   1857           # expected to function on.  It corresponds to the
   1858           # MAC_OS_X_VERSION_MIN_REQUIRED compile-time macro.  To ensure these
   1859           # macros are available, #include <AvailabilityMacros.h>.  Additional
   1860           # documentation on these macros is available at
   1861           # http://developer.apple.com/mac/library/technotes/tn2002/tn2064.html#SECTION3
   1862           # Chrome normally builds with the Mac OS X 10.6 SDK and sets the
   1863           # deployment target to 10.6.  Other projects, such as O3D, may
   1864           # override these defaults.
   1865 
   1866           # Normally, mac_sdk_min is used to find an SDK that Xcode knows
   1867           # about that is at least the specified version. In official builds,
   1868           # the SDK must match mac_sdk_min exactly. If the SDK is installed
   1869           # someplace that Xcode doesn't know about, set mac_sdk_path to the
   1870           # path to the SDK; when set to a non-empty string, SDK detection
   1871           # based on mac_sdk_min will be bypassed entirely.
   1872           'mac_sdk_min%': '10.6',
   1873           'mac_sdk_path%': '',
   1874 
   1875           'mac_deployment_target%': '10.6',
   1876         },
   1877 
   1878         'mac_sdk_min': '<(mac_sdk_min)',
   1879         'mac_sdk_path': '<(mac_sdk_path)',
   1880         'mac_deployment_target': '<(mac_deployment_target)',
   1881 
   1882         # Compile in Breakpad support by default so that it can be
   1883         # tested, even if it is not enabled by default at runtime.
   1884         'mac_breakpad_compiled_in%': 1,
   1885         'conditions': [
   1886           # mac_product_name is set to the name of the .app bundle as it should
   1887           # appear on disk.  This duplicates data from
   1888           # chrome/app/theme/chromium/BRANDING and
   1889           # chrome/app/theme/google_chrome/BRANDING, but is necessary to get
   1890           # these names into the build system.
   1891           ['branding=="Chrome"', {
   1892             'mac_product_name%': 'Google Chrome',
   1893           }, { # else: branding!="Chrome"
   1894             'mac_product_name%': 'Chromium',
   1895           }],
   1896 
   1897           ['branding=="Chrome" and buildtype=="Official"', {
   1898             'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py --verify <(mac_sdk_min) --sdk_path=<(mac_sdk_path))',
   1899             # Enable uploading crash dumps.
   1900             'mac_breakpad_uploads%': 1,
   1901             # Enable dumping symbols at build time for use by Mac Breakpad.
   1902             'mac_breakpad%': 1,
   1903             # Enable Keystone auto-update support.
   1904             'mac_keystone%': 1,
   1905           }, { # else: branding!="Chrome" or buildtype!="Official"
   1906             'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py <(mac_sdk_min))',
   1907             'mac_breakpad_uploads%': 0,
   1908             'mac_breakpad%': 0,
   1909             'mac_keystone%': 0,
   1910           }],
   1911         ],
   1912       }],  # OS=="mac" or OS=="ios"
   1913       ['OS=="win"', {
   1914         'conditions': [
   1915           # This is the architecture convention used in WinSDK paths.
   1916           ['target_arch=="ia32"', {
   1917             'winsdk_arch%': 'x86',
   1918           },{
   1919             'winsdk_arch%': '<(target_arch)',
   1920           }],
   1921           ['component=="shared_library"', {
   1922             'win_use_allocator_shim%': 0,
   1923           },{
   1924             # Turn on multiple dll by default on Windows when in static_library.
   1925             'chrome_multiple_dll%': 1,
   1926           }],
   1927           ['asan==1', {
   1928             'win_use_allocator_shim%': 0,
   1929           }],
   1930           ['component=="shared_library" and "<(GENERATOR)"=="ninja"', {
   1931             # Only enabled by default for ninja because it's buggy in VS.
   1932             # Not enabled for component=static_library because some targets
   1933             # are too large and the toolchain fails due to the size of the
   1934             # .obj files.
   1935             'incremental_chrome_dll%': 1,
   1936           }],
   1937           # Don't do incremental linking for large modules on 32-bit or when
   1938           # component=static_library as the toolchain fails due to the size of
   1939           # the .ilk files.
   1940           ['MSVS_OS_BITS==32 or component=="static_library"', {
   1941             'msvs_large_module_debug_link_mode%': '1',  # No
   1942           },{
   1943             'msvs_large_module_debug_link_mode%': '2',  # Yes
   1944           }],
   1945           ['MSVS_VERSION=="2013e"', {
   1946             'msvs_express%': 1,
   1947             'secure_atl%': 0,
   1948           },{
   1949             'msvs_express%': 0,
   1950             'secure_atl%': 1,
   1951           }],
   1952         ],
   1953         'nacl_win64_defines': [
   1954           # This flag is used to minimize dependencies when building
   1955           # Native Client loader for 64-bit Windows.
   1956           'NACL_WIN64',
   1957         ],
   1958       }],
   1959 
   1960       ['os_posix==1 and chromeos==0 and OS!="android" and OS!="ios" and embedded==0', {
   1961         'use_cups%': 1,
   1962       }, {
   1963         'use_cups%': 0,
   1964       }],
   1965 
   1966       ['enable_plugins==1 and (OS=="linux" or OS=="mac" or OS=="win")', {
   1967         'enable_pepper_cdms%': 1,
   1968       }, {
   1969         'enable_pepper_cdms%': 0,
   1970       }],
   1971 
   1972       ['OS=="android"', {
   1973         'enable_browser_cdms%': 1,
   1974       }, {
   1975         'enable_browser_cdms%': 0,
   1976       }],
   1977 
   1978       # Native Client glibc toolchain is enabled
   1979       # by default except on arm, mips and mips64.
   1980       ['target_arch=="arm" or target_arch=="mipsel" or target_arch=="mips64el"', {
   1981         'disable_glibc%': 1,
   1982       }, {
   1983         'disable_glibc%': 0,
   1984       }],
   1985 
   1986       # Set the relative path from this file to the GYP file of the JPEG
   1987       # library used by Chromium.
   1988       ['use_system_libjpeg==1 or use_libjpeg_turbo==0', {
   1989         # Configuration for using the system libjeg is here.
   1990         'libjpeg_gyp_path': '../third_party/libjpeg/libjpeg.gyp',
   1991       }, {
   1992         'libjpeg_gyp_path': '../third_party/libjpeg_turbo/libjpeg.gyp',
   1993       }],
   1994 
   1995       # Options controlling the use of GConf (the classic GNOME configuration
   1996       # system) and GIO, which contains GSettings (the new GNOME config system).
   1997       ['chromeos==1 or embedded==1', {
   1998         'use_gconf%': 0,
   1999         'use_gio%': 0,
   2000       }, {
   2001         'use_gconf%': 1,
   2002         'use_gio%': 1,
   2003       }],
   2004 
   2005       # Set up -D and -E flags passed into grit.
   2006       ['branding=="Chrome"', {
   2007         # TODO(mmoss) The .grd files look for _google_chrome, but for
   2008         # consistency they should look for google_chrome_build like C++.
   2009         'grit_defines': ['-D', '_google_chrome',
   2010                          '-E', 'CHROMIUM_BUILD=google_chrome'],
   2011       }, {
   2012         'grit_defines': ['-D', '_chromium',
   2013                          '-E', 'CHROMIUM_BUILD=chromium'],
   2014       }],
   2015       ['chromeos==1', {
   2016         'grit_defines': ['-D', 'chromeos', '-D', 'scale_factors=2x'],
   2017       }],
   2018       ['desktop_linux==1', {
   2019         'grit_defines': ['-D', 'desktop_linux'],
   2020       }],
   2021       ['toolkit_views==1', {
   2022         'grit_defines': ['-D', 'toolkit_views'],
   2023       }],
   2024       ['use_aura==1', {
   2025         'grit_defines': ['-D', 'use_aura'],
   2026       }],
   2027       ['use_ash==1', {
   2028         'grit_defines': ['-D', 'use_ash'],
   2029       }],
   2030       ['use_nss==1', {
   2031         'grit_defines': ['-D', 'use_nss'],
   2032       }],
   2033       ['use_ozone==1', {
   2034         'grit_defines': ['-D', 'use_ozone'],
   2035       }],
   2036       ['image_loader_extension==1', {
   2037         'grit_defines': ['-D', 'image_loader_extension'],
   2038       }],
   2039       ['remoting==1', {
   2040         'grit_defines': ['-D', 'remoting'],
   2041       }],
   2042       ['use_titlecase_in_grd==1', {
   2043         'grit_defines': ['-D', 'use_titlecase'],
   2044       }],
   2045       ['use_third_party_translations==1', {
   2046         'grit_defines': ['-D', 'use_third_party_translations'],
   2047         'locales': [
   2048           'ast', 'bs', 'ca@valencia', 'en-AU', 'eo', 'eu', 'gl', 'hy', 'ia',
   2049           'ka', 'ku', 'kw', 'ms', 'ug'
   2050         ],
   2051       }],
   2052       ['OS=="android"', {
   2053         'grit_defines': ['-t', 'android',
   2054                          '-E', 'ANDROID_JAVA_TAGGED_ONLY=true'],
   2055       }],
   2056       ['OS=="mac" or OS=="ios"', {
   2057         'grit_defines': ['-D', 'scale_factors=2x'],
   2058       }],
   2059       ['OS == "ios"', {
   2060         'grit_defines': [
   2061           '-t', 'ios',
   2062           # iOS uses a whitelist to filter resources.
   2063           '-w', '<(DEPTH)/build/ios/grit_whitelist.txt'
   2064         ],
   2065 
   2066         # Enable host builds when generating with ninja-ios.
   2067         'conditions': [
   2068           ['"<(GENERATOR)"=="ninja"', {
   2069             'host_os%': "mac",
   2070           }],
   2071 
   2072           # TODO(sdefresne): Remove the target_subarch check once Apple has
   2073           # upstreamed the support for "arm64". http://crbug.com/341453
   2074           ['target_subarch!="arm32" or "<(GENERATOR)"=="xcode"', {
   2075             'clang_xcode%': 1,
   2076           }],
   2077         ],
   2078       }],
   2079       ['enable_extensions==1', {
   2080         'grit_defines': ['-D', 'enable_extensions'],
   2081       }],
   2082       ['enable_plugins!=0', {
   2083         'grit_defines': ['-D', 'enable_plugins'],
   2084       }],
   2085       ['enable_printing!=0', {
   2086         'grit_defines': ['-D', 'enable_printing'],
   2087       }],
   2088       ['enable_printing==1', {
   2089         'grit_defines': ['-D', 'enable_full_printing'],
   2090       }],
   2091       ['enable_themes==1', {
   2092         'grit_defines': ['-D', 'enable_themes'],
   2093       }],
   2094       ['enable_app_list==1', {
   2095         'grit_defines': ['-D', 'enable_app_list'],
   2096       }],
   2097       ['enable_settings_app==1', {
   2098         'grit_defines': ['-D', 'enable_settings_app'],
   2099       }],
   2100       ['enable_google_now==1', {
   2101         'grit_defines': ['-D', 'enable_google_now'],
   2102       }],
   2103       ['use_concatenated_impulse_responses==1', {
   2104         'grit_defines': ['-D', 'use_concatenated_impulse_responses'],
   2105       }],
   2106       ['enable_webrtc==1', {
   2107         'grit_defines': ['-D', 'enable_webrtc'],
   2108       }],
   2109       ['enable_hangout_services_extension==1', {
   2110         'grit_defines': ['-D', 'enable_hangout_services_extension'],
   2111       }],
   2112       ['enable_task_manager==1', {
   2113         'grit_defines': ['-D', 'enable_task_manager'],
   2114       }],
   2115       ['notifications==1', {
   2116         'grit_defines': ['-D', 'enable_notifications'],
   2117       }],
   2118       ['enable_wifi_bootstrapping==1', {
   2119         'grit_defines': ['-D', 'enable_wifi_bootstrapping'],
   2120       }],
   2121       ['enable_resource_whitelist_generation==1 and OS!="win"', {
   2122         'grit_rc_header_format': ['-h', '#define {textual_id} _Pragma("whitelisted_resource_{numeric_id}") {numeric_id}'],
   2123       }],
   2124       ['enable_resource_whitelist_generation==1 and OS=="win"', {
   2125         'grit_rc_header_format': ['-h', '#define {textual_id} __pragma(message("whitelisted_resource_{numeric_id}")) {numeric_id}'],
   2126       }],
   2127       ['enable_mdns==1 or OS=="mac"', {
   2128         'grit_defines': ['-D', 'enable_service_discovery'],
   2129         'enable_service_discovery%': 1
   2130       }],
   2131       ['clang_use_chrome_plugins==1 and OS!="win"', {
   2132         'clang_chrome_plugins_flags': [
   2133           '<!@(<(DEPTH)/tools/clang/scripts/plugin_flags.sh)'
   2134         ],
   2135       }],
   2136       ['asan==1 or msan==1 or lsan==1 or tsan==1', {
   2137         'clang%': 1,
   2138         'use_allocator%': 'none',
   2139         'use_sanitizer_options%': 1,
   2140       }],
   2141       ['asan==1 and OS=="linux" and chromeos==0', {
   2142         'use_custom_libcxx%': 1,
   2143       }],
   2144       ['ubsan==1', {
   2145         'clang%': 1,
   2146       }],
   2147       ['ubsan_vptr==1', {
   2148         'clang%': 1,
   2149       }],
   2150       ['asan==1 and OS=="mac"', {
   2151         # TODO(glider): we do not strip ASan binaries until the dynamic ASan
   2152         # runtime is fully adopted. See http://crbug.com/242503.
   2153         'mac_strip_release': 0,
   2154       }],
   2155       ['tsan==1', {
   2156         'use_custom_libcxx%': 1,
   2157       }],
   2158       ['msan==1', {
   2159         # Use a just-built, MSan-instrumented libc++ instead of the system-wide
   2160         # libstdc++. This is required to avoid false positive reports whenever
   2161         # the C++ standard library is used.
   2162         'use_custom_libcxx%': 1,
   2163         # Running the V8-generated code on an ARM simulator is a powerful hack
   2164         # that allows the tool to see the memory accesses from JITted code.
   2165         # Without this flag, JS code causes false positive reports from MSan.
   2166         'v8_target_arch': 'arm64',
   2167       }],
   2168 
   2169       ['OS=="linux" and clang_type_profiler==1', {
   2170         'clang%': 1,
   2171         'clang_use_chrome_plugins%': 0,
   2172         'conditions': [
   2173           ['host_arch=="x64"', {
   2174             'make_clang_dir%': 'third_party/llvm-allocated-type/Linux_x64',
   2175           }],
   2176           ['host_arch=="ia32"', {
   2177             # 32-bit Clang is unsupported.  It may not build.  Put your 32-bit
   2178             # Clang in this directory at your own risk if needed for some
   2179             # purpose (e.g. to compare 32-bit and 64-bit behavior like memory
   2180             # usage).  Any failure by this compiler should not close the tree.
   2181             'make_clang_dir%': 'third_party/llvm-allocated-type/Linux_ia32',
   2182           }],
   2183         ],
   2184       }],
   2185 
   2186       ['OS=="win"', {
   2187         # The Clang plugins don't currently work on Windows.
   2188         # TODO(hans): One day, this will work. (crbug.com/82385)
   2189         'clang_use_chrome_plugins%': 0,
   2190       }],
   2191 
   2192       # On valgrind bots, override the optimizer settings so we don't inline too
   2193       # much and make the stacks harder to figure out.
   2194       #
   2195       # TODO(rnk): Kill off variables that no one else uses and just implement
   2196       # them under a build_for_tool== condition.
   2197       ['build_for_tool=="memcheck" or build_for_tool=="tsan"', {
   2198         # gcc flags
   2199         'mac_debug_optimization': '1',
   2200         'mac_release_optimization': '1',
   2201         'release_optimize': '1',
   2202         'no_gc_sections': 1,
   2203         'debug_extra_cflags': '-g -fno-inline -fno-omit-frame-pointer '
   2204                               '-fno-builtin -fno-optimize-sibling-calls',
   2205         'release_extra_cflags': '-g -fno-inline -fno-omit-frame-pointer '
   2206                                 '-fno-builtin -fno-optimize-sibling-calls',
   2207 
   2208         # MSVS flags for TSan on Pin and Windows.
   2209         'win_debug_RuntimeChecks': '0',
   2210         'win_debug_disable_iterator_debugging': '1',
   2211         'win_debug_Optimization': '1',
   2212         'win_debug_InlineFunctionExpansion': '0',
   2213         'win_release_InlineFunctionExpansion': '0',
   2214         'win_release_OmitFramePointers': '0',
   2215 
   2216         'use_allocator': 'tcmalloc',
   2217         'release_valgrind_build': 1,
   2218         'werror': '',
   2219         'component': 'static_library',
   2220         'use_system_zlib': 0,
   2221       }],
   2222 
   2223       # Build tweaks for DrMemory.
   2224       # TODO(rnk): Combine with tsan config to share the builder.
   2225       # http://crbug.com/108155
   2226       ['build_for_tool=="drmemory"', {
   2227         # These runtime checks force initialization of stack vars which blocks
   2228         # DrMemory's uninit detection.
   2229         'win_debug_RuntimeChecks': '0',
   2230         # Iterator debugging is slow.
   2231         'win_debug_disable_iterator_debugging': '1',
   2232         # Try to disable optimizations that mess up stacks in a release build.
   2233         # DrM-i#1054 (http://code.google.com/p/drmemory/issues/detail?id=1054)
   2234         # /O2 and /Ob0 (disable inline) cannot be used together because of a
   2235         # compiler bug, so we use /Ob1 instead.
   2236         'win_release_InlineFunctionExpansion': '1',
   2237         'win_release_OmitFramePointers': '0',
   2238         # Ditto for debug, to support bumping win_debug_Optimization.
   2239         'win_debug_InlineFunctionExpansion': 0,
   2240         'win_debug_OmitFramePointers': 0,
   2241         # Keep the code under #ifndef NVALGRIND.
   2242         'release_valgrind_build': 1,
   2243       }],
   2244 
   2245       # Enable RLZ on Win, Mac, iOS and ChromeOS.
   2246       ['branding=="Chrome" and (OS=="win" or OS=="mac" or OS=="ios" or chromeos==1)', {
   2247         'enable_rlz%': 1,
   2248       }],
   2249 
   2250       # Set default compiler flags depending on ARM version.
   2251       ['arm_version==6 and android_webview_build==0', {
   2252         'arm_arch%': 'armv6',
   2253         'arm_tune%': '',
   2254         'arm_fpu%': 'vfp',
   2255         'arm_float_abi%': 'softfp',
   2256         'arm_thumb%': 0,
   2257       }],
   2258       ['arm_version==7 and android_webview_build==0', {
   2259         'arm_arch%': 'armv7-a',
   2260         'arm_tune%': 'generic-armv7-a',
   2261         'conditions': [
   2262           ['arm_neon==1', {
   2263             'arm_fpu%': 'neon',
   2264           }, {
   2265             'arm_fpu%': 'vfpv3-d16',
   2266           }],
   2267         ],
   2268         # Change the default to hard once the armhf transition is complete.
   2269         'arm_float_abi%': 'softfp',
   2270         'arm_thumb%': 1,
   2271       }],
   2272 
   2273       # Set default compiler flags depending on MIPS architecture variant.
   2274       ['target_arch=="mipsel" and mips_arch_variant=="r2" and android_webview_build==0', {
   2275         'mips_fpu_mode%': 'fp32',
   2276       }],
   2277 
   2278       ['android_webview_build==1', {
   2279         # The WebView build gets its cpu-specific flags from the Android build system.
   2280         'arm_arch%': '',
   2281         'arm_tune%': '',
   2282         'arm_fpu%': '',
   2283         'arm_float_abi%': '',
   2284         'arm_thumb%': 0,
   2285         'mips_fpu_mode%': '',
   2286       }],
   2287 
   2288       # Enable brlapi by default for chromeos.
   2289       [ 'chromeos==1', {
   2290         'use_brlapi%': 1,
   2291       }],
   2292 
   2293       ['use_ozone==1 and ozone_auto_platforms==1', {
   2294         # Use test as the default platform.
   2295         'ozone_platform%': 'test',
   2296 
   2297         # Build all platforms whose deps are in install-build-deps.sh.
   2298         # Only these platforms will be compile tested by buildbots.
   2299         'ozone_platform_dri%': 1,
   2300         'ozone_platform_test%': 1,
   2301         'ozone_platform_egltest%': 1,
   2302       }],
   2303 
   2304       ['desktop_linux==1 and use_aura==1 and use_x11==1', {
   2305         'use_clipboard_aurax11%': 1,
   2306       }],
   2307 
   2308       ['OS=="win" and use_goma==1', {
   2309         # goma doesn't support pch yet.
   2310         'chromium_win_pch': 0,
   2311         # goma doesn't support PDB yet, so win_z7=1 or fastbuild=1.
   2312         'conditions': [
   2313           ['win_z7==0 and fastbuild==0', {
   2314             'fastbuild': 1,
   2315           }],
   2316         ],
   2317       }],
   2318 
   2319       ['OS=="win" and (clang==1 or asan==1)', {
   2320         'chromium_win_pch': 0,
   2321       }],
   2322 
   2323       ['host_clang==1', {
   2324         'host_cc': '<(make_clang_dir)/bin/clang',
   2325         'host_cxx': '<(make_clang_dir)/bin/clang++',
   2326       }, {
   2327         'host_cc': '<!(which gcc)',
   2328         'host_cxx': '<!(which g++)',
   2329       }],
   2330 
   2331       # The seccomp-bpf sandbox is only supported on five architectures
   2332       # currently.
   2333       # Do not disable seccomp_bpf anywhere without talking to
   2334       # security (a] chromium.org!
   2335       ['((OS=="linux" or OS=="android") and '
   2336            '(target_arch=="ia32" or target_arch=="x64" or '
   2337              'target_arch=="arm" or target_arch=="mipsel" or '
   2338              'target_arch=="arm64"))', {
   2339          'use_seccomp_bpf%': 1,
   2340       }, {
   2341          'use_seccomp_bpf%': 0,
   2342       }],
   2343     ],
   2344 
   2345     # The path to the ANGLE library.
   2346     'angle_path': '<(DEPTH)/third_party/angle',
   2347 
   2348     # TODO(jmadill): remove angle_gyp. http://crbug.com/415983
   2349     # This temporary variable lets us change the name of the gyp file
   2350     # in blink and in chromium simultaneously. It should go away after
   2351     # we're done changing the path.
   2352     'angle_gyp': 'build_angle.gyp',
   2353 
   2354     # List of default apps to install in new profiles.  The first list contains
   2355     # the source files as found in svn.  The second list, used only for linux,
   2356     # contains the destination location for each of the files.  When a crx
   2357     # is added or removed from the list, the chrome/browser/resources/
   2358     # default_apps/external_extensions.json file must also be updated.
   2359     'default_apps_list': [
   2360       'browser/resources/default_apps/external_extensions.json',
   2361       'browser/resources/default_apps/gmail.crx',
   2362       'browser/resources/default_apps/search.crx',
   2363       'browser/resources/default_apps/youtube.crx',
   2364       'browser/resources/default_apps/drive.crx',
   2365       'browser/resources/default_apps/docs.crx',
   2366     ],
   2367     'default_apps_list_linux_dest': [
   2368       '<(PRODUCT_DIR)/default_apps/external_extensions.json',
   2369       '<(PRODUCT_DIR)/default_apps/gmail.crx',
   2370       '<(PRODUCT_DIR)/default_apps/search.crx',
   2371       '<(PRODUCT_DIR)/default_apps/youtube.crx',
   2372       '<(PRODUCT_DIR)/default_apps/drive.crx',
   2373       '<(PRODUCT_DIR)/default_apps/docs.crx',
   2374     ],
   2375 
   2376     # Whether to allow building of the GPU-related isolates.
   2377     'archive_gpu_tests%': 0,
   2378 
   2379      # Whether to allow building of chromoting related isolates.
   2380     'archive_chromoting_tests%': 0,
   2381   },
   2382   'target_defaults': {
   2383     'variables': {
   2384       # The condition that operates on chromium_code is in a target_conditions
   2385       # section, and will not have access to the default fallback value of
   2386       # chromium_code at the top of this file, or to the chromium_code
   2387       # variable placed at the root variables scope of .gyp files, because
   2388       # those variables are not set at target scope.  As a workaround,
   2389       # if chromium_code is not set at target scope, define it in target scope
   2390       # to contain whatever value it has during early variable expansion.
   2391       # That's enough to make it available during target conditional
   2392       # processing.
   2393       'chromium_code%': '<(chromium_code)',
   2394 
   2395       'component%': '<(component)',
   2396 
   2397       'chromecast%': '<(chromecast)',
   2398 
   2399       # See http://msdn.microsoft.com/en-us/library/aa652360(VS.71).aspx
   2400       'win_release_Optimization%': '2', # 2 = /Os
   2401       'win_debug_Optimization%': '0',   # 0 = /Od
   2402 
   2403       # See http://msdn.microsoft.com/en-us/library/2kxx5t2c(v=vs.80).aspx
   2404       # Tri-state: blank is default, 1 on, 0 off
   2405       'win_release_OmitFramePointers%': '0',
   2406       # Tri-state: blank is default, 1 on, 0 off
   2407       'win_debug_OmitFramePointers%': '',
   2408 
   2409       # See http://msdn.microsoft.com/en-us/library/8wtf2dfz(VS.71).aspx
   2410       'win_debug_RuntimeChecks%': '3',    # 3 = all checks enabled, 0 = off
   2411 
   2412       # See http://msdn.microsoft.com/en-us/library/47238hez(VS.71).aspx
   2413       'win_debug_InlineFunctionExpansion%': '',    # empty = default, 0 = off,
   2414       'win_release_InlineFunctionExpansion%': '2', # 1 = only __inline, 2 = max
   2415 
   2416       # VS inserts quite a lot of extra checks to algorithms like
   2417       # std::partial_sort in Debug build which make them O(N^2)
   2418       # instead of O(N*logN). This is particularly slow under memory
   2419       # tools like ThreadSanitizer so we want it to be disablable.
   2420       # See http://msdn.microsoft.com/en-us/library/aa985982(v=VS.80).aspx
   2421       'win_debug_disable_iterator_debugging%': '0',
   2422 
   2423       # An application manifest fragment to declare compatibility settings for
   2424       # 'executable' targets. Ignored in other target type.
   2425       'win_exe_compatibility_manifest%':
   2426           '<(DEPTH)\\build\\win\\compatibility.manifest',
   2427 
   2428       'release_extra_cflags%': '',
   2429       'debug_extra_cflags%': '',
   2430 
   2431       'release_valgrind_build%': '<(release_valgrind_build)',
   2432 
   2433       # the non-qualified versions are widely assumed to be *nix-only
   2434       'win_release_extra_cflags%': '',
   2435       'win_debug_extra_cflags%': '',
   2436 
   2437       # TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
   2438       'enable_wexit_time_destructors%': '<(enable_wexit_time_destructors)',
   2439 
   2440       # Only used by Windows build for now.  Can be used to build into a
   2441       # differet output directory, e.g., a build_dir_prefix of VS2010_ would
   2442       # output files in src/build/VS2010_{Debug,Release}.
   2443       'build_dir_prefix%': '',
   2444 
   2445       # Targets are by default not nacl untrusted code.
   2446       'nacl_untrusted_build%': 0,
   2447 
   2448       'pnacl_compile_flags': [
   2449         # pnacl uses the clang compiler so we need to suppress all the
   2450         # same warnings as we do for clang.
   2451         # TODO(sbc): Remove these if/when they are removed from the clang
   2452         # build.
   2453         '-Wno-unused-function',
   2454         '-Wno-char-subscripts',
   2455         '-Wno-c++11-extensions',
   2456         '-Wno-unnamed-type-template-args',
   2457       ],
   2458 
   2459       'conditions': [
   2460         ['OS=="win" and component=="shared_library"', {
   2461           # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
   2462           'win_release_RuntimeLibrary%': '2', # 2 = /MD (nondebug DLL)
   2463           'win_debug_RuntimeLibrary%': '3',   # 3 = /MDd (debug DLL)
   2464         }, {
   2465           # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
   2466           'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
   2467           'win_debug_RuntimeLibrary%': '1',   # 1 = /MTd (debug static)
   2468         }],
   2469         ['OS=="ios"', {
   2470           # See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Optimize-Options.html
   2471           'mac_release_optimization%': 's', # Use -Os unless overridden
   2472           'mac_debug_optimization%': '0',   # Use -O0 unless overridden
   2473         }, {
   2474           # See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Optimize-Options.html
   2475           'mac_release_optimization%': '3', # Use -O3 unless overridden
   2476           'mac_debug_optimization%': '0',   # Use -O0 unless overridden
   2477         }],
   2478         ['OS=="android"', {
   2479           'host_os%': '<(host_os)',  # See comment above chromium_code.
   2480         }],
   2481       ],
   2482       'clang_warning_flags': [
   2483         '-Wheader-hygiene',
   2484 
   2485         # Don't die on dtoa code that uses a char as an array index.
   2486         # This is required solely for base/third_party/dmg_fp/dtoa.cc.
   2487         '-Wno-char-subscripts',
   2488 
   2489         # TODO(thakis): This used to be implied by -Wno-unused-function,
   2490         # which we no longer use. Check if it makes sense to remove
   2491         # this as well. http://crbug.com/316352
   2492         '-Wno-unneeded-internal-declaration',
   2493 
   2494         # Warns on switches on enums that cover all enum values but
   2495         # also contain a default: branch. Chrome is full of that.
   2496         '-Wno-covered-switch-default',
   2497 
   2498         # Warns when a const char[] is converted to bool.
   2499         '-Wstring-conversion',
   2500 
   2501         # C++11-related flags:
   2502 
   2503         # This warns on using ints as initializers for floats in
   2504         # initializer lists (e.g. |int a = f(); CGSize s = { a, a };|),
   2505         # which happens in several places in chrome code. Not sure if
   2506         # this is worth fixing.
   2507         '-Wno-c++11-narrowing',
   2508 
   2509         # Clang considers the `register` keyword as deprecated, but e.g.
   2510         # code generated by flex (used in angle) contains that keyword.
   2511         # http://crbug.com/255186
   2512         '-Wno-deprecated-register',
   2513 
   2514         # TODO(hans): Clean this up. Or disable with finer granularity.
   2515         '-Wno-unused-local-typedef',
   2516       ],
   2517     },
   2518     'includes': [ 'set_clang_warning_flags.gypi', ],
   2519     'defines': [
   2520       # Don't use deprecated V8 APIs anywhere.
   2521       'V8_DEPRECATION_WARNINGS',
   2522     ],
   2523     'include_dirs': [
   2524       '<(SHARED_INTERMEDIATE_DIR)',
   2525     ],
   2526     'conditions': [
   2527       ['(OS=="mac" or OS=="ios") and asan==1', {
   2528         'dependencies': [
   2529           '<(DEPTH)/build/mac/asan.gyp:asan_dynamic_runtime',
   2530         ],
   2531       }],
   2532       ['OS=="win" and asan==1 and component=="shared_library"', {
   2533         'dependencies': [
   2534           '<(DEPTH)/build/win/asan.gyp:asan_dynamic_runtime',
   2535         ],
   2536       }],
   2537       ['OS=="linux" and use_allocator!="none" and clang_type_profiler==1', {
   2538         'cflags_cc!': ['-fno-rtti'],
   2539         'cflags_cc+': [
   2540           '-frtti',
   2541           '-gline-tables-only',
   2542           '-fintercept-allocation-functions',
   2543         ],
   2544         'defines': ['TYPE_PROFILING'],
   2545         'dependencies': [
   2546           '<(DEPTH)/base/allocator/allocator.gyp:type_profiler',
   2547         ],
   2548       }],
   2549       ['branding=="Chrome"', {
   2550         'defines': ['GOOGLE_CHROME_BUILD'],
   2551       }, {  # else: branding!="Chrome"
   2552         'defines': ['CHROMIUM_BUILD'],
   2553       }],
   2554       ['OS=="mac" and component=="shared_library"', {
   2555         'xcode_settings': {
   2556           'DYLIB_INSTALL_NAME_BASE': '@rpath',
   2557           'LD_RUNPATH_SEARCH_PATHS': [
   2558             # For unbundled binaries.
   2559             '@loader_path/.',
   2560             # For bundled binaries, to get back from Binary.app/Contents/MacOS.
   2561             '@loader_path/../../..',
   2562           ],
   2563         },
   2564       }],
   2565       ['clang==1 and OS!="win"', {
   2566         # This is here so that all files get recompiled after a clang roll and
   2567         # when turning clang on or off.
   2568         # (defines are passed via the command line, and build systems rebuild
   2569         # things when their commandline changes). Nothing should ever read this
   2570         # define.
   2571         'defines': ['CR_CLANG_REVISION=<!(<(DEPTH)/tools/clang/scripts/update.sh --print-revision)'],
   2572       }],
   2573       ['enable_rlz==1', {
   2574         'defines': ['ENABLE_RLZ'],
   2575       }],
   2576       ['component=="shared_library"', {
   2577         'defines': ['COMPONENT_BUILD'],
   2578       }],
   2579       ['toolkit_views==1', {
   2580         'defines': ['TOOLKIT_VIEWS=1'],
   2581       }],
   2582       ['ui_compositor_image_transport==1', {
   2583         'defines': ['UI_COMPOSITOR_IMAGE_TRANSPORT'],
   2584       }],
   2585       ['use_aura==1', {
   2586         'defines': ['USE_AURA=1'],
   2587       }],
   2588       ['use_ash==1', {
   2589         'defines': ['USE_ASH=1'],
   2590       }],
   2591       ['use_pango==1', {
   2592         'defines': ['USE_PANGO=1'],
   2593       }],
   2594       ['use_cairo==1', {
   2595         'defines': ['USE_CAIRO=1'],
   2596       }],
   2597       ['use_cras==1', {
   2598         'defines': ['USE_CRAS=1'],
   2599       }],
   2600       ['use_glib==1', {
   2601         'defines': ['USE_GLIB=1'],
   2602       }],
   2603       ['use_ozone==1', {
   2604         'defines': ['USE_OZONE=1'],
   2605       }],
   2606       ['use_default_render_theme==1', {
   2607         'defines': ['USE_DEFAULT_RENDER_THEME=1'],
   2608       }],
   2609       ['use_libjpeg_turbo==1', {
   2610         'defines': ['USE_LIBJPEG_TURBO=1'],
   2611       }],
   2612       ['use_x11==1', {
   2613         'defines': ['USE_X11=1'],
   2614       }],
   2615       ['use_clipboard_aurax11==1', {
   2616         'defines': ['USE_CLIPBOARD_AURAX11=1'],
   2617       }],
   2618       ['enable_one_click_signin==1', {
   2619         'defines': ['ENABLE_ONE_CLICK_SIGNIN'],
   2620       }],
   2621       ['enable_pre_sync_backup==1', {
   2622         'defines': ['ENABLE_PRE_SYNC_BACKUP'],
   2623       }],
   2624       ['use_xi2_mt!=0 and use_x11==1', {
   2625         'defines': ['USE_XI2_MT=<(use_xi2_mt)'],
   2626       }],
   2627       ['image_loader_extension==1', {
   2628         'defines': ['IMAGE_LOADER_EXTENSION=1'],
   2629       }],
   2630       ['profiling==1', {
   2631         'defines': ['ENABLE_PROFILING=1'],
   2632       }],
   2633       ['remoting==1', {
   2634         'defines': ['ENABLE_REMOTING=1'],
   2635       }],
   2636       ['enable_webrtc==1', {
   2637         'defines': ['ENABLE_WEBRTC=1'],
   2638       }],
   2639       ['proprietary_codecs==1', {
   2640         'defines': ['USE_PROPRIETARY_CODECS'],
   2641         'conditions': [
   2642           ['enable_mpeg2ts_stream_parser==1', {
   2643             'defines': ['ENABLE_MPEG2TS_STREAM_PARSER'],
   2644           }],
   2645         ],
   2646       }],
   2647       ['enable_viewport==1', {
   2648         'defines': ['ENABLE_VIEWPORT'],
   2649       }],
   2650       ['enable_pepper_cdms==1', {
   2651         'defines': ['ENABLE_PEPPER_CDMS'],
   2652       }],
   2653       ['enable_browser_cdms==1', {
   2654         'defines': ['ENABLE_BROWSER_CDMS'],
   2655       }],
   2656       ['configuration_policy==1', {
   2657         'defines': ['ENABLE_CONFIGURATION_POLICY'],
   2658       }],
   2659       ['notifications==1', {
   2660         'defines': ['ENABLE_NOTIFICATIONS'],
   2661       }],
   2662       ['enable_hidpi==1', {
   2663         'defines': ['ENABLE_HIDPI=1'],
   2664       }],
   2665       ['native_discardable_memory==1', {
   2666         'defines': ['DISCARDABLE_MEMORY_ALWAYS_SUPPORTED_NATIVELY'],
   2667       }],
   2668       ['native_memory_pressure_signals==1', {
   2669         'defines': ['SYSTEM_NATIVELY_SIGNALS_MEMORY_PRESSURE'],
   2670       }],
   2671       ['use_udev==1', {
   2672         'defines': ['USE_UDEV'],
   2673       }],
   2674       ['fastbuild!=0', {
   2675         'xcode_settings': {
   2676           'GCC_GENERATE_DEBUGGING_SYMBOLS': 'NO',
   2677         },
   2678         'conditions': [
   2679           ['clang==1 and asan==0 and msan==0 and tsan==0 and ubsan_vptr==0', {
   2680             # Clang creates chubby debug information, which makes linking very
   2681             # slow. For now, don't create debug information with clang.  See
   2682             # http://crbug.com/70000
   2683             'conditions': [
   2684               ['OS=="linux"', {
   2685                 'variables': {
   2686                   'debug_extra_cflags': '-g0',
   2687                 },
   2688               }],
   2689               # Android builds symbols on release by default, disable them.
   2690               ['OS=="android"', {
   2691                 'variables': {
   2692                   'debug_extra_cflags': '-g0',
   2693                   'release_extra_cflags': '-g0',
   2694                 },
   2695               }],
   2696             ],
   2697           }, { # else clang!=1
   2698             'conditions': [
   2699               ['OS=="win" and fastbuild==2', {
   2700                 # Completely disable debug information.
   2701                 'msvs_settings': {
   2702                   'VCLinkerTool': {
   2703                     'GenerateDebugInformation': 'false',
   2704                   },
   2705                   'VCCLCompilerTool': {
   2706                     'DebugInformationFormat': '0',
   2707                   },
   2708                 },
   2709               }],
   2710               ['OS=="win" and fastbuild==1', {
   2711                 'msvs_settings': {
   2712                   'VCLinkerTool': {
   2713                     # This tells the linker to generate .pdbs, so that
   2714                     # we can get meaningful stack traces.
   2715                     'GenerateDebugInformation': 'true',
   2716                   },
   2717                   'VCCLCompilerTool': {
   2718                     # No debug info to be generated by compiler.
   2719                     'DebugInformationFormat': '0',
   2720                   },
   2721                 },
   2722               }],
   2723               ['OS=="linux" and fastbuild==2', {
   2724                 'variables': {
   2725                   'debug_extra_cflags': '-g0',
   2726                 },
   2727               }],
   2728               ['OS=="linux" and fastbuild==1', {
   2729                 'variables': {
   2730                   'debug_extra_cflags': '-g1',
   2731                 },
   2732               }],
   2733               ['OS=="android" and fastbuild==2', {
   2734                 'variables': {
   2735                   'debug_extra_cflags': '-g0',
   2736                   'release_extra_cflags': '-g0',
   2737                 },
   2738               }],
   2739               ['OS=="android" and fastbuild==1', {
   2740                 'variables': {
   2741                   'debug_extra_cflags': '-g1',
   2742                   'release_extra_cflags': '-g1',
   2743                 },
   2744               }],
   2745             ],
   2746           }], # clang!=1
   2747         ],
   2748       }],  # fastbuild!=0
   2749       ['dont_embed_build_metadata==1', {
   2750         'defines': [
   2751           'DONT_EMBED_BUILD_METADATA',
   2752         ],
   2753       }],  # dont_embed_build_metadata==1
   2754       ['dcheck_always_on!=0', {
   2755         'defines': ['DCHECK_ALWAYS_ON=1'],
   2756       }],  # dcheck_always_on!=0
   2757       ['tracing_like_official_build!=0', {
   2758         'defines': ['TRACING_IS_OFFICIAL_BUILD=1'],
   2759       }],  # tracing_like_official_build!=0
   2760       ['win_use_allocator_shim==0', {
   2761         'conditions': [
   2762           ['OS=="win"', {
   2763             'defines': ['NO_TCMALLOC'],
   2764           }],
   2765         ],
   2766       }],
   2767       ['enable_eglimage==1', {
   2768         'defines': [
   2769           'ENABLE_EGLIMAGE=1',
   2770         ],
   2771       }],
   2772       ['asan==1', {
   2773         'defines': [
   2774           'ADDRESS_SANITIZER',
   2775           'MEMORY_TOOL_REPLACES_ALLOCATOR',
   2776           'MEMORY_SANITIZER_INITIAL_SIZE',
   2777         ],
   2778       }],
   2779       ['syzyasan==1', {
   2780         # SyzyAsan needs /PROFILE turned on to produce appropriate pdbs.
   2781         'msvs_settings': {
   2782           'VCLinkerTool': {
   2783             'Profile': 'true',
   2784           },
   2785         },
   2786         'defines': [
   2787             'SYZYASAN',
   2788             'MEMORY_TOOL_REPLACES_ALLOCATOR',
   2789             'MEMORY_SANITIZER_INITIAL_SIZE',
   2790         ],
   2791       }],
   2792       ['OS=="win"', {
   2793         'defines': [
   2794           '__STD_C',
   2795           '_CRT_SECURE_NO_DEPRECATE',
   2796           '_SCL_SECURE_NO_DEPRECATE',
   2797           # This define is required to pull in the new Win8 interfaces from
   2798           # system headers like ShObjIdl.h.
   2799           'NTDDI_VERSION=0x06020000',
   2800           # This is required for ATL to use XP-safe versions of its functions.
   2801           '_USING_V110_SDK71_',
   2802         ],
   2803         'include_dirs': [
   2804           '<(DEPTH)/third_party/wtl/include',
   2805         ],
   2806         'conditions': [
   2807           ['win_z7!=0', {
   2808             'msvs_settings': {
   2809               # Generates debug info when win_z7=1
   2810               # even if fastbuild=1 (that makes GenerateDebugInformation false).
   2811               'VCLinkerTool': {
   2812                 'GenerateDebugInformation': 'true',
   2813               },
   2814               'VCCLCompilerTool': {
   2815                 'DebugInformationFormat': '1',
   2816               }
   2817             }
   2818           }],
   2819         ],  # win_z7!=0
   2820       }],  # OS==win
   2821       ['chromecast==1', {
   2822         'defines': [
   2823           'LOG_DISABLED=0',
   2824         ],
   2825         'conditions': [
   2826           ['target_arch=="arm"', {
   2827             'defines': [
   2828               # TODO(lcwu): Work around an error when building Chromium
   2829               # with gcc-4.5.3 (e.g. v8/src/platform-linux.cc). Remove
   2830               # this define once the toolchain is updated.
   2831               # See crbug.com/388933.
   2832               '__SOFTFP',
   2833             ],
   2834           }],
   2835           ['use_playready==1', {
   2836             'defines': [
   2837               'PLAYREADY_CDM_AVAILABLE',
   2838             ],
   2839           }],
   2840         ],
   2841       }],
   2842       ['enable_task_manager==1', {
   2843         'defines': [
   2844           'ENABLE_TASK_MANAGER=1',
   2845         ],
   2846       }],
   2847       ['enable_extensions==1', {
   2848         'defines': [
   2849           'ENABLE_EXTENSIONS=1',
   2850         ],
   2851       }],
   2852       ['OS=="win" and branding=="Chrome"', {
   2853         'defines': ['ENABLE_SWIFTSHADER'],
   2854       }],
   2855       ['enable_dart==1', {
   2856         'defines': ['WEBKIT_USING_DART=1'],
   2857       }],
   2858       ['enable_plugin_installation==1', {
   2859         'defines': ['ENABLE_PLUGIN_INSTALLATION=1'],
   2860       }],
   2861       ['enable_plugins==1', {
   2862         'defines': ['ENABLE_PLUGINS=1'],
   2863       }],
   2864       ['enable_session_service==1', {
   2865         'defines': ['ENABLE_SESSION_SERVICE=1'],
   2866       }],
   2867       ['enable_themes==1', {
   2868         'defines': ['ENABLE_THEMES=1'],
   2869       }],
   2870       ['enable_autofill_dialog==1', {
   2871         'defines': ['ENABLE_AUTOFILL_DIALOG=1'],
   2872       }],
   2873       ['enable_prod_wallet_service==1', {
   2874         'defines': ['ENABLE_PROD_WALLET_SERVICE=1'],
   2875       }],
   2876       ['enable_background==1', {
   2877         'defines': ['ENABLE_BACKGROUND=1'],
   2878       }],
   2879       ['enable_google_now==1', {
   2880         'defines': ['ENABLE_GOOGLE_NOW=1'],
   2881       }],
   2882       ['cld_version!=0', {
   2883         'defines': ['CLD_VERSION=<(cld_version)'],
   2884       }],
   2885       ['cld_version==2', {
   2886         # This is used to populate the "CLD Data Source" field in:
   2887         # chrome://translate-internals
   2888         'defines': ['CLD2_DATA_SOURCE=<(cld2_data_source)'],
   2889       }],
   2890       ['enable_printing==1', {
   2891         'defines': ['ENABLE_FULL_PRINTING=1', 'ENABLE_PRINTING=1'],
   2892       }],
   2893       ['enable_printing==2', {
   2894         'defines': ['ENABLE_PRINTING=1'],
   2895       }],
   2896       ['enable_spellcheck==1', {
   2897         'defines': ['ENABLE_SPELLCHECK=1'],
   2898       }],
   2899       ['enable_captive_portal_detection==1', {
   2900         'defines': ['ENABLE_CAPTIVE_PORTAL_DETECTION=1'],
   2901       }],
   2902       ['enable_app_list==1', {
   2903         'defines': ['ENABLE_APP_LIST=1'],
   2904       }],
   2905       ['enable_settings_app==1', {
   2906         'defines': ['ENABLE_SETTINGS_APP=1'],
   2907       }],
   2908       ['disable_file_support==1', {
   2909         'defines': ['DISABLE_FILE_SUPPORT=1'],
   2910       }],
   2911       ['disable_ftp_support==1', {
   2912         'defines': ['DISABLE_FTP_SUPPORT=1'],
   2913       }],
   2914       ['use_icu_alternatives_on_android==1', {
   2915         'defines': ['USE_ICU_ALTERNATIVES_ON_ANDROID=1'],
   2916       }],
   2917       ['enable_managed_users==1', {
   2918         'defines': ['ENABLE_MANAGED_USERS=1'],
   2919       }],
   2920       ['data_reduction_fallback_host != ""', {
   2921         'defines': [
   2922           'DATA_REDUCTION_FALLBACK_HOST="<(data_reduction_fallback_host)"'],
   2923       }],
   2924       ['data_reduction_dev_host != ""', {
   2925         'defines': [
   2926           'DATA_REDUCTION_DEV_HOST="<(data_reduction_dev_host)"'],
   2927       }],
   2928       ['data_reduction_dev_fallback_host != ""', {
   2929         'defines': [
   2930           'DATA_REDUCTION_DEV_FALLBACK_HOST="<(data_reduction_dev_fallback_host)"'],
   2931       }],
   2932       ['spdy_proxy_auth_origin != ""', {
   2933         'defines': ['SPDY_PROXY_AUTH_ORIGIN="<(spdy_proxy_auth_origin)"'],
   2934       }],
   2935       ['spdy_proxy_auth_property != ""', {
   2936         'defines': ['SPDY_PROXY_AUTH_PROPERTY="<(spdy_proxy_auth_property)"'],
   2937       }],
   2938       ['spdy_proxy_auth_value != ""', {
   2939         'defines': ['SPDY_PROXY_AUTH_VALUE="<(spdy_proxy_auth_value)"'],
   2940       }],
   2941       ['data_reduction_proxy_probe_url != ""', {
   2942         'defines': [
   2943           'DATA_REDUCTION_PROXY_PROBE_URL="<(data_reduction_proxy_probe_url)"'],
   2944       }],
   2945       ['data_reduction_proxy_warmup_url != ""', {
   2946         'defines': [
   2947           'DATA_REDUCTION_PROXY_WARMUP_URL="<(data_reduction_proxy_warmup_url)"'],
   2948       }],
   2949       ['data_reduction_proxy_ssl_origin != ""', {
   2950         'defines': [
   2951           'DATA_REDUCTION_PROXY_SSL_ORIGIN="<(data_reduction_proxy_ssl_origin)"'],
   2952       }],
   2953       ['data_reduction_proxy_alt_origin != ""', {
   2954         'defines': [
   2955           'DATA_REDUCTION_PROXY_ALT_ORIGIN="<(data_reduction_proxy_alt_origin)"'],
   2956       }],
   2957       ['data_reduction_proxy_alt_fallback_origin != ""', {
   2958         'defines': [
   2959           'DATA_REDUCTION_PROXY_ALT_FALLBACK_ORIGIN="<(data_reduction_proxy_alt_fallback_origin)"'],
   2960       }],
   2961       ['enable_mdns==1', {
   2962         'defines': ['ENABLE_MDNS=1'],
   2963       }],
   2964       ['enable_service_discovery==1', {
   2965         'defines' : [ 'ENABLE_SERVICE_DISCOVERY=1' ],
   2966       }],
   2967       ['enable_wifi_bootstrapping==1', {
   2968         'defines' : [ 'ENABLE_WIFI_BOOTSTRAPPING=1' ],
   2969       }],
   2970       ['enable_hangout_services_extension==1', {
   2971         'defines': ['ENABLE_HANGOUT_SERVICES_EXTENSION=1'],
   2972       }],
   2973       ['enable_ipc_fuzzer==1', {
   2974         'defines': ['ENABLE_IPC_FUZZER=1'],
   2975       }],
   2976       ['video_hole==1', {
   2977         'defines': ['VIDEO_HOLE=1'],
   2978       }],
   2979       ['enable_load_completion_hacks==1', {
   2980         'defines': ['ENABLE_LOAD_COMPLETION_HACKS=1'],
   2981       }],
   2982     ],  # conditions for 'target_defaults'
   2983     'target_conditions': [
   2984       ['<(use_openssl)==1', {
   2985         'defines': ['USE_OPENSSL=1'],
   2986       }],
   2987       ['<(use_openssl_certs)==1', {
   2988         'defines': ['USE_OPENSSL_CERTS=1'],
   2989       }],
   2990       ['>(nacl_untrusted_build)==1', {
   2991         'defines': [
   2992           'USE_OPENSSL=1',
   2993           'USE_OPENSSL_CERTS=1',
   2994         ],
   2995       }],
   2996       ['<(use_nss)==1 and >(nacl_untrusted_build)==0', {
   2997         'defines': ['USE_NSS=1'],
   2998       }],
   2999       ['<(chromeos)==1 and >(nacl_untrusted_build)==0', {
   3000         'defines': ['OS_CHROMEOS=1'],
   3001       }],
   3002       ['enable_wexit_time_destructors==1 and OS!="win"', {
   3003         # TODO: Enable on Windows too, http://crbug.com/404525
   3004         'variables': { 'clang_warning_flags': ['-Wexit-time-destructors']},
   3005       }],
   3006       ['chromium_code==0', {
   3007         'conditions': [
   3008           [ 'os_posix==1 and OS!="mac" and OS!="ios"', {
   3009             # We don't want to get warnings from third-party code,
   3010             # so remove any existing warning-enabling flags like -Wall.
   3011             'cflags!': [
   3012               '-Wall',
   3013               '-Wextra',
   3014             ],
   3015             'cflags_cc': [
   3016               # Don't warn about hash_map in third-party code.
   3017               '-Wno-deprecated',
   3018             ],
   3019             'cflags': [
   3020               # Don't warn about printf format problems.
   3021               # This is off by default in gcc but on in Ubuntu's gcc(!).
   3022               '-Wno-format',
   3023             ],
   3024             'cflags_cc!': [
   3025               # Necessary because llvm.org/PR10448 is WONTFIX (crbug.com/90453).
   3026               '-Wsign-compare',
   3027             ]
   3028           }],
   3029           # TODO: Fix all warnings on chromeos too.
   3030           [ 'os_posix==1 and OS!="mac" and OS!="ios" and (clang!=1 or chromeos==1)', {
   3031             'cflags!': [
   3032               '-Werror',
   3033             ],
   3034           }],
   3035           [ 'os_posix==1 and os_bsd!=1 and OS!="mac" and OS!="android"', {
   3036             'cflags': [
   3037               # Don't warn about ignoring the return value from e.g. close().
   3038               # This is off by default in some gccs but on by default in others.
   3039               # BSD systems do not support this option, since they are usually
   3040               # using gcc 4.2.1, which does not have this flag yet.
   3041               '-Wno-unused-result',
   3042             ],
   3043           }],
   3044           [ 'OS=="win"', {
   3045             'defines': [
   3046               '_CRT_SECURE_NO_DEPRECATE',
   3047               '_CRT_NONSTDC_NO_WARNINGS',
   3048               '_CRT_NONSTDC_NO_DEPRECATE',
   3049               '_SCL_SECURE_NO_DEPRECATE',
   3050             ],
   3051             'msvs_disabled_warnings': [4800],
   3052             'msvs_settings': {
   3053               'VCCLCompilerTool': {
   3054                 'WarningLevel': '3',
   3055                 'WarnAsError': 'true',
   3056                 'Detect64BitPortabilityProblems': 'false',
   3057               },
   3058             },
   3059             'conditions': [
   3060               ['buildtype=="Official"', {
   3061                 'msvs_settings': {
   3062                   'VCCLCompilerTool': { 'WarnAsError': 'false' },
   3063                 }
   3064               }],
   3065               ['clang==1', {
   3066                 'msvs_settings': {
   3067                   'VCCLCompilerTool': { 'WarnAsError': 'false' },
   3068                 }
   3069               }],
   3070               [ 'component=="shared_library"', {
   3071               # TODO(darin): Unfortunately, some third_party code depends on base.
   3072                 'msvs_disabled_warnings': [
   3073                   4251,  # class 'std::xx' needs to have dll-interface.
   3074                  ],
   3075               }],
   3076             ],
   3077           }],
   3078 
   3079           [ 'OS=="mac" or OS=="ios"', {
   3080             'xcode_settings': {
   3081               'WARNING_CFLAGS!': ['-Wall', '-Wextra'],
   3082             },
   3083             'conditions': [
   3084               ['buildtype=="Official"', {
   3085                 'xcode_settings': {
   3086                   'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO',    # -Werror
   3087                 },
   3088               }],
   3089             ],
   3090           }],
   3091           [ 'OS=="ios"', {
   3092             'xcode_settings': {
   3093               # TODO(ios): Fix remaining warnings in third-party code, then
   3094               # remove this; the Mac cleanup didn't get everything that's
   3095               # flagged in an iOS build.
   3096               'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO',
   3097               'RUN_CLANG_STATIC_ANALYZER': 'NO',
   3098               # Several internal ios directories generate numerous warnings for
   3099               # -Wobjc-missing-property-synthesis.
   3100               'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'NO',
   3101             },
   3102           }],
   3103         ],
   3104       }, {
   3105         'includes': [
   3106            # Rules for excluding e.g. foo_win.cc from the build on non-Windows.
   3107           'filename_rules.gypi',
   3108         ],
   3109         # In Chromium code, we define __STDC_foo_MACROS in order to get the
   3110         # C99 macros on Mac and Linux.
   3111         'defines': [
   3112           '__STDC_CONSTANT_MACROS',
   3113           '__STDC_FORMAT_MACROS',
   3114         ],
   3115         'conditions': [
   3116           ['OS=="win"', {
   3117             # turn on warnings for signed/unsigned mismatch on chromium code.
   3118             'msvs_settings': {
   3119               'VCCLCompilerTool': {
   3120                 'AdditionalOptions': ['/we4389'],
   3121               },
   3122             },
   3123           }],
   3124           ['OS=="win" and component=="shared_library"', {
   3125             'msvs_disabled_warnings': [
   3126               4251,  # class 'std::xx' needs to have dll-interface.
   3127             ],
   3128           }],
   3129         ],
   3130       }],
   3131     ],  # target_conditions for 'target_defaults'
   3132     'default_configuration': 'Debug',
   3133     'configurations': {
   3134       # VCLinkerTool LinkIncremental values below:
   3135       #   0 == default
   3136       #   1 == /INCREMENTAL:NO
   3137       #   2 == /INCREMENTAL
   3138       # Debug links incremental, Release does not.
   3139       #
   3140       # Abstract base configurations to cover common attributes.
   3141       #
   3142       'Common_Base': {
   3143         'abstract': 1,
   3144         'msvs_configuration_attributes': {
   3145           'OutputDirectory': '<(DEPTH)\\build\\<(build_dir_prefix)$(ConfigurationName)',
   3146           'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
   3147           'CharacterSet': '1',
   3148         },
   3149         # Add the default import libs.
   3150         'msvs_settings':{
   3151           'VCLinkerTool': {
   3152             'AdditionalDependencies': [
   3153               'kernel32.lib',
   3154               'gdi32.lib',
   3155               'winspool.lib',
   3156               'comdlg32.lib',
   3157               'advapi32.lib',
   3158               'shell32.lib',
   3159               'ole32.lib',
   3160               'oleaut32.lib',
   3161               'user32.lib',
   3162               'uuid.lib',
   3163               'odbc32.lib',
   3164               'odbccp32.lib',
   3165               'delayimp.lib',
   3166               'credui.lib',
   3167               'netapi32.lib',
   3168             ],
   3169           },
   3170         },
   3171       },
   3172       'x86_Base': {
   3173         'abstract': 1,
   3174         'msvs_settings': {
   3175           'VCLinkerTool': {
   3176             'MinimumRequiredVersion': '5.01',  # XP.
   3177             'TargetMachine': '1',
   3178           },
   3179           'VCLibrarianTool': {
   3180             'TargetMachine': '1',
   3181           },
   3182         },
   3183         'msvs_configuration_platform': 'Win32',
   3184       },
   3185       'x64_Base': {
   3186         'abstract': 1,
   3187         'msvs_configuration_platform': 'x64',
   3188         'msvs_settings': {
   3189           'VCLinkerTool': {
   3190             # Make sure to understand http://crbug.com/361720 if you want to
   3191             # increase this.
   3192             'MinimumRequiredVersion': '5.02',  # Server 2003.
   3193             'TargetMachine': '17', # x86 - 64
   3194             'AdditionalLibraryDirectories!':
   3195               ['<(windows_sdk_path)/Lib/win8/um/x86'],
   3196             'AdditionalLibraryDirectories':
   3197               ['<(windows_sdk_path)/Lib/win8/um/x64'],
   3198             # Doesn't exist x64 SDK. Should use oleaut32 in any case.
   3199             'IgnoreDefaultLibraryNames': [ 'olepro32.lib' ],
   3200           },
   3201           'VCLibrarianTool': {
   3202             'AdditionalLibraryDirectories!':
   3203               ['<(windows_sdk_path)/Lib/win8/um/x86'],
   3204             'AdditionalLibraryDirectories':
   3205               ['<(windows_sdk_path)/Lib/win8/um/x64'],
   3206             'TargetMachine': '17', # x64
   3207           },
   3208         },
   3209       },
   3210       'Debug_Base': {
   3211         'abstract': 1,
   3212         'defines': [
   3213           'DYNAMIC_ANNOTATIONS_ENABLED=1',
   3214           'WTF_USE_DYNAMIC_ANNOTATIONS=1',
   3215         ],
   3216         'xcode_settings': {
   3217           'GCC_OPTIMIZATION_LEVEL': '<(mac_debug_optimization)',
   3218           'OTHER_CFLAGS': [
   3219             '<@(debug_extra_cflags)',
   3220           ],
   3221         },
   3222         'msvs_settings': {
   3223           'VCCLCompilerTool': {
   3224             'Optimization': '<(win_debug_Optimization)',
   3225             'PreprocessorDefinitions': ['_DEBUG'],
   3226             'BasicRuntimeChecks': '<(win_debug_RuntimeChecks)',
   3227             'RuntimeLibrary': '<(win_debug_RuntimeLibrary)',
   3228             'conditions': [
   3229               # According to MSVS, InlineFunctionExpansion=0 means
   3230               # "default inlining", not "/Ob0".
   3231               # Thus, we have to handle InlineFunctionExpansion==0 separately.
   3232               ['win_debug_InlineFunctionExpansion==0', {
   3233                 'AdditionalOptions': ['/Ob0'],
   3234               }],
   3235               ['win_debug_InlineFunctionExpansion!=""', {
   3236                 'InlineFunctionExpansion':
   3237                   '<(win_debug_InlineFunctionExpansion)',
   3238               }],
   3239               ['win_debug_disable_iterator_debugging==1', {
   3240                 'PreprocessorDefinitions': ['_HAS_ITERATOR_DEBUGGING=0'],
   3241               }],
   3242 
   3243               # if win_debug_OmitFramePointers is blank, leave as default
   3244               ['win_debug_OmitFramePointers==1', {
   3245                 'OmitFramePointers': 'true',
   3246               }],
   3247               ['win_debug_OmitFramePointers==0', {
   3248                 'OmitFramePointers': 'false',
   3249                 # The above is not sufficient (http://crbug.com/106711): it
   3250                 # simply eliminates an explicit "/Oy", but both /O2 and /Ox
   3251                 # perform FPO regardless, so we must explicitly disable.
   3252                 # We still want the false setting above to avoid having
   3253                 # "/Oy /Oy-" and warnings about overriding.
   3254                 'AdditionalOptions': ['/Oy-'],
   3255               }],
   3256             ],
   3257             'AdditionalOptions': [ '<@(win_debug_extra_cflags)', ],
   3258           },
   3259           'VCLinkerTool': {
   3260             'LinkIncremental': '<(msvs_debug_link_incremental)',
   3261             # ASLR makes debugging with windbg difficult because Chrome.exe and
   3262             # Chrome.dll share the same base name. As result, windbg will
   3263             # name the Chrome.dll module like chrome_<base address>, where
   3264             # <base address> typically changes with each launch. This in turn
   3265             # means that breakpoints in Chrome.dll don't stick from one launch
   3266             # to the next. For this reason, we turn ASLR off in debug builds.
   3267             # Note that this is a three-way bool, where 0 means to pick up
   3268             # the default setting, 1 is off and 2 is on.
   3269             'RandomizedBaseAddress': 1,
   3270           },
   3271           'VCResourceCompilerTool': {
   3272             'PreprocessorDefinitions': ['_DEBUG'],
   3273           },
   3274         },
   3275         'conditions': [
   3276           ['OS=="linux" or OS=="android"', {
   3277             'target_conditions': [
   3278               ['_toolset=="target"', {
   3279                 'cflags': [
   3280                   '<@(debug_extra_cflags)',
   3281                 ],
   3282               }],
   3283             ],
   3284           }],
   3285           ['OS=="linux" and target_arch!="ia32" and disable_glibcxx_debug==0', {
   3286             # Enable libstdc++ debugging facilities to help catch problems
   3287             # early, see http://crbug.com/65151 .
   3288             # TODO(phajdan.jr): Should we enable this for all of POSIX?
   3289             'defines': ['_GLIBCXX_DEBUG=1',],
   3290           }],
   3291           ['release_valgrind_build==0', {
   3292             'xcode_settings': {
   3293               'OTHER_CFLAGS': [
   3294                 '-fstack-protector-all',  # Implies -fstack-protector
   3295               ],
   3296             },
   3297           }],
   3298           ['clang==1', {
   3299             'cflags': [
   3300               # Allow comparing the address of references and 'this' against 0
   3301               # in debug builds. Technically, these can never be null in
   3302               # well-defined C/C++ and Clang can optimize such checks away in
   3303               # release builds, but they may be used in asserts in debug builds.
   3304               '-Wno-undefined-bool-conversion',
   3305               '-Wno-tautological-undefined-compare',
   3306             ],
   3307             'xcode_settings': {
   3308               'OTHER_CFLAGS': [
   3309                 '-Wno-undefined-bool-conversion',
   3310                 '-Wno-tautological-undefined-compare',
   3311               ],
   3312             },
   3313             'msvs_settings': {
   3314               'VCCLCompilerTool': {
   3315                 'AdditionalOptions': [
   3316                   '-Wno-undefined-bool-conversion',
   3317                   '-Wno-tautological-undefined-compare',
   3318                 ],
   3319               },
   3320             },
   3321           }],
   3322         ],
   3323       },
   3324       'Release_Base': {
   3325         'abstract': 1,
   3326         'defines': [
   3327           'NDEBUG',
   3328         ],
   3329         'xcode_settings': {
   3330           'DEAD_CODE_STRIPPING': 'YES',  # -Wl,-dead_strip
   3331           'GCC_OPTIMIZATION_LEVEL': '<(mac_release_optimization)',
   3332           'OTHER_CFLAGS': [ '<@(release_extra_cflags)', ],
   3333         },
   3334         'msvs_settings': {
   3335           'VCCLCompilerTool': {
   3336             'RuntimeLibrary': '<(win_release_RuntimeLibrary)',
   3337             'conditions': [
   3338               # In official builds, each target will self-select
   3339               # an optimization level.
   3340               ['buildtype!="Official"', {
   3341                   'Optimization': '<(win_release_Optimization)',
   3342                 },
   3343               ],
   3344               # According to MSVS, InlineFunctionExpansion=0 means
   3345               # "default inlining", not "/Ob0".
   3346               # Thus, we have to handle InlineFunctionExpansion==0 separately.
   3347               ['win_release_InlineFunctionExpansion==0', {
   3348                 'AdditionalOptions': ['/Ob0'],
   3349               }],
   3350               ['win_release_InlineFunctionExpansion!=""', {
   3351                 'InlineFunctionExpansion':
   3352                   '<(win_release_InlineFunctionExpansion)',
   3353               }],
   3354 
   3355               # if win_release_OmitFramePointers is blank, leave as default
   3356               ['win_release_OmitFramePointers==1', {
   3357                 'OmitFramePointers': 'true',
   3358               }],
   3359               ['win_release_OmitFramePointers==0', {
   3360                 'OmitFramePointers': 'false',
   3361                 # The above is not sufficient (http://crbug.com/106711): it
   3362                 # simply eliminates an explicit "/Oy", but both /O2 and /Ox
   3363                 # perform FPO regardless, so we must explicitly disable.
   3364                 # We still want the false setting above to avoid having
   3365                 # "/Oy /Oy-" and warnings about overriding.
   3366                 'AdditionalOptions': ['/Oy-'],
   3367               }],
   3368             ],
   3369             'AdditionalOptions': [
   3370                 '/d2Zi+',  # Improve debugging of Release builds.
   3371                 '/Zc:inline',  # Remove unreferenced COMDAT (faster links).
   3372                 '<@(win_release_extra_cflags)',
   3373             ],
   3374           },
   3375           'VCLinkerTool': {
   3376             # LinkIncremental is a tri-state boolean, where 0 means default
   3377             # (i.e., inherit from parent solution), 1 means false, and
   3378             # 2 means true.
   3379             'LinkIncremental': '1',
   3380             # This corresponds to the /PROFILE flag which ensures the PDB
   3381             # file contains FIXUP information (growing the PDB file by about
   3382             # 5%) but does not otherwise alter the output binary. This
   3383             # information is used by the Syzygy optimization tool when
   3384             # decomposing the release image.
   3385             'Profile': 'true',
   3386           },
   3387         },
   3388         'conditions': [
   3389           ['msvs_use_common_release', {
   3390             'includes': ['release.gypi'],
   3391           }],
   3392           ['release_valgrind_build==0 and tsan==0', {
   3393             'defines': [
   3394               'NVALGRIND',
   3395               'DYNAMIC_ANNOTATIONS_ENABLED=0',
   3396             ],
   3397           }, {
   3398             'defines': [
   3399               'MEMORY_TOOL_REPLACES_ALLOCATOR',
   3400               'MEMORY_SANITIZER_INITIAL_SIZE',
   3401               'DYNAMIC_ANNOTATIONS_ENABLED=1',
   3402               'WTF_USE_DYNAMIC_ANNOTATIONS=1',
   3403             ],
   3404           }],
   3405           ['win_use_allocator_shim==0', {
   3406             'defines': ['NO_TCMALLOC'],
   3407           }],
   3408           # _FORTIFY_SOURCE isn't really supported by Clang now, see
   3409           # http://llvm.org/bugs/show_bug.cgi?id=16821.
   3410           # It seems to work fine with Ubuntu 12 headers though, so use it
   3411           # in official builds.
   3412           ['os_posix==1 and (asan!=1 and msan!=1 and tsan!=1 and lsan!=1 and ubsan!=1) and (OS!="linux" or clang!=1 or buildtype=="Official")', {
   3413             'target_conditions': [
   3414               ['chromium_code==1', {
   3415                 # Non-chromium code is not guaranteed to compile cleanly
   3416                 # with _FORTIFY_SOURCE. Also, fortified build may fail
   3417                 # when optimizations are disabled, so only do that for Release
   3418                 # build.
   3419                 'defines': [
   3420                   '_FORTIFY_SOURCE=2',
   3421                 ],
   3422               }],
   3423             ],
   3424           }],
   3425           ['OS=="linux" or OS=="android"', {
   3426             'target_conditions': [
   3427               ['_toolset=="target"', {
   3428                 'cflags': [
   3429                   '<@(release_extra_cflags)',
   3430                 ],
   3431                 'conditions': [
   3432                   ['enable_resource_whitelist_generation==1', {
   3433                     'cflags': [
   3434                       '-Wunknown-pragmas -Wno-error=unknown-pragmas',
   3435                     ],
   3436                   }],
   3437                 ],
   3438               }],
   3439             ],
   3440           }],
   3441           ['OS=="ios"', {
   3442             'defines': [
   3443               'NS_BLOCK_ASSERTIONS=1',
   3444             ],
   3445           }],
   3446         ],
   3447       },
   3448       #
   3449       # Concrete configurations
   3450       #
   3451       'Debug': {
   3452         'inherit_from': ['Common_Base', 'x86_Base', 'Debug_Base'],
   3453       },
   3454       'Release': {
   3455         'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base'],
   3456       },
   3457       'conditions': [
   3458         [ 'OS=="ios"', {
   3459           'Profile': {
   3460             'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base'],
   3461             'target_conditions': [
   3462               [ '_type=="executable"', {
   3463                 # To get a real .dSYM bundle produced by dsymutil, set the
   3464                 # debug information format to dwarf-with-dsym.  Since
   3465                 # strip_from_xcode will not be used, set Xcode to do the
   3466                 # stripping as well.
   3467                 'xcode_settings': {
   3468                   'DEBUG_INFORMATION_FORMAT': 'dwarf-with-dsym',
   3469                   'DEPLOYMENT_POSTPROCESSING': 'YES',
   3470                   'STRIP_INSTALLED_PRODUCT': 'YES',
   3471                 },
   3472               }],
   3473             ],
   3474           },
   3475         }],
   3476         [ 'OS=="win"', {
   3477           # TODO(bradnelson): add a gyp mechanism to make this more graceful.
   3478           'Debug_x64': {
   3479             'inherit_from': ['Common_Base', 'x64_Base', 'Debug_Base'],
   3480           },
   3481           'Release_x64': {
   3482             'inherit_from': ['Common_Base', 'x64_Base', 'Release_Base'],
   3483           },
   3484         }],
   3485       ],
   3486     },
   3487   },
   3488   'conditions': [
   3489     ['os_posix==1', {
   3490       'target_defaults': {
   3491         'ldflags': [
   3492           '-Wl,-z,now',
   3493           '-Wl,-z,relro',
   3494         ],
   3495         # TODO(glider): enable the default options on other systems.
   3496         'conditions': [
   3497           ['use_sanitizer_options==1 and ((OS=="linux" and (chromeos==0 or target_arch!="ia32")) or OS=="mac")', {
   3498             'dependencies': [
   3499               '<(DEPTH)/build/sanitizers/sanitizers.gyp:sanitizer_options',
   3500             ],
   3501           }],
   3502         ],
   3503       },
   3504     }],
   3505     # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
   3506     ['os_posix==1 and disable_fatal_linker_warnings==0 and use_evdev_gestures==0 and (chromeos==0 or target_arch!="arm")', {
   3507       'target_defaults': {
   3508         'ldflags': [
   3509           '-Wl,--fatal-warnings',
   3510         ],
   3511       },
   3512     }],
   3513     ['os_posix==1 and chromeos==0', {
   3514       # Chrome OS enables -fstack-protector-strong via its build wrapper,
   3515       # and we want to avoid overriding this, so stack-protector is only
   3516       # enabled when not building on Chrome OS.
   3517       # TODO(phajdan.jr): Use -fstack-protector-strong when our gcc
   3518       # supports it.
   3519       'target_defaults': {
   3520         'cflags': [
   3521           '-fstack-protector',
   3522           '--param=ssp-buffer-size=4',
   3523         ],
   3524       },
   3525     }],
   3526     ['os_posix==1 and OS!="mac" and OS!="ios"', {
   3527       'target_defaults': {
   3528         # Enable -Werror by default, but put it in a variable so it can
   3529         # be disabled in ~/.gyp/include.gypi on the valgrind builders.
   3530         'variables': {
   3531           'werror%': '-Werror',
   3532           'libraries_for_target%': '',
   3533         },
   3534         'defines': [
   3535           '_FILE_OFFSET_BITS=64',
   3536         ],
   3537         'cflags': [
   3538           '<(werror)',  # See note above about the werror variable.
   3539           '-pthread',
   3540           '-fno-strict-aliasing',  # See http://crbug.com/32204
   3541           '-Wall',
   3542           # TODO(evan): turn this back on once all the builds work.
   3543           # '-Wextra',
   3544           # Don't warn about unused function params.  We use those everywhere.
   3545           '-Wno-unused-parameter',
   3546           # Don't warn about the "struct foo f = {0};" initialization pattern.
   3547           '-Wno-missing-field-initializers',
   3548           # Don't export any symbols (for example, to plugins we dlopen()).
   3549           # Note: this is *required* to make some plugins work.
   3550           '-fvisibility=hidden',
   3551           '-pipe',
   3552         ],
   3553         'cflags_cc': [
   3554           '-fno-exceptions',
   3555           '-fno-rtti',
   3556           '-fno-threadsafe-statics',
   3557           # Make inline functions have hidden visiblity by default.
   3558           # Surprisingly, not covered by -fvisibility=hidden.
   3559           '-fvisibility-inlines-hidden',
   3560           # GCC turns on -Wsign-compare for C++ under -Wall, but clang doesn't,
   3561           # so we specify it explicitly.  (llvm.org/PR10448, crbug.com/90453)
   3562           '-Wsign-compare',
   3563         ],
   3564         'ldflags': [
   3565           '-pthread', '-Wl,-z,noexecstack',
   3566         ],
   3567         'libraries' : [
   3568           '<(libraries_for_target)',
   3569         ],
   3570         'configurations': {
   3571           'Debug_Base': {
   3572             'variables': {
   3573               'debug_optimize%': '0',
   3574             },
   3575             'defines': [
   3576               '_DEBUG',
   3577             ],
   3578             'cflags': [
   3579               '-O>(debug_optimize)',
   3580               '-g',
   3581               '-gdwarf-4',
   3582             ],
   3583             'conditions' : [
   3584               ['OS=="android"', {
   3585                 'ldflags': [
   3586                   # Warn in case of text relocations.
   3587                   '-Wl,--warn-shared-textrel',
   3588                 ],
   3589               }],
   3590               ['OS=="android" and android_full_debug==0', {
   3591                 # Some configurations are copied from Release_Base to reduce
   3592                 # the binary size.
   3593                 'variables': {
   3594                   'debug_optimize%': 's',
   3595                 },
   3596                 'cflags': [
   3597                   '-fdata-sections',
   3598                   '-ffunction-sections',
   3599                 ],
   3600                 'ldflags': [
   3601                   '-Wl,-O1',
   3602                   '-Wl,--as-needed',
   3603                 ],
   3604               }],
   3605               ['OS=="android" and android_full_debug==0 and target_arch!="arm64"', {
   3606                 # We don't omit frame pointers on arm64 since they are required
   3607                 # to correctly unwind stackframes which contain system library
   3608                 # function frames (crbug.com/391706).
   3609                 'cflags': [
   3610                   '-fomit-frame-pointer',
   3611                 ],
   3612               }],
   3613               ['OS=="linux" and target_arch=="ia32"', {
   3614                 'ldflags': [
   3615                   '-Wl,--no-as-needed',
   3616                 ],
   3617               }],
   3618               ['debug_unwind_tables==1', {
   3619                 'cflags': ['-funwind-tables'],
   3620               }, {
   3621                 'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
   3622               }],
   3623               # TODO(mostynb): shuffle clang/gcc_version/binutils_version
   3624               # definitions in to the right scope to use them when setting
   3625               # linux_use_debug_fission, so it can be used here alone.
   3626               ['linux_use_debug_fission==1 and linux_use_gold_flags==1 and (clang==1 or gcc_version>=48) and binutils_version>=223', {
   3627                 'cflags': ['-gsplit-dwarf'],
   3628               }],
   3629             ],
   3630           },
   3631           'Release_Base': {
   3632             'variables': {
   3633               'release_optimize%': '2',
   3634               # Binaries become big and gold is unable to perform GC
   3635               # and remove unused sections for some of test targets
   3636               # on 32 bit platform.
   3637               # (This is currently observed only in chromeos valgrind bots)
   3638               # The following flag is to disable --gc-sections linker
   3639               # option for these bots.
   3640               'no_gc_sections%': 0,
   3641 
   3642               # TODO(bradnelson): reexamine how this is done if we change the
   3643               # expansion of configurations
   3644               'release_valgrind_build%': 0,
   3645             },
   3646             'cflags': [
   3647               '-O<(release_optimize)',
   3648               # Don't emit the GCC version ident directives, they just end up
   3649               # in the .comment section taking up binary size.
   3650               '-fno-ident',
   3651               # Put data and code in their own sections, so that unused symbols
   3652               # can be removed at link time with --gc-sections.
   3653               '-fdata-sections',
   3654               '-ffunction-sections',
   3655             ],
   3656             'ldflags': [
   3657               # Specifically tell the linker to perform optimizations.
   3658               # See http://lwn.net/Articles/192624/ .
   3659               '-Wl,-O1',
   3660               '-Wl,--as-needed',
   3661             ],
   3662             'conditions' : [
   3663               ['no_gc_sections==0', {
   3664                 'ldflags': [
   3665                   '-Wl,--gc-sections',
   3666                 ],
   3667               }],
   3668               ['OS=="android" and target_arch!="arm64"', {
   3669                 # We don't omit frame pointers on arm64 since they are required
   3670                 # to correctly unwind stackframes which contain system library
   3671                 # function frames (crbug.com/391706).
   3672                 'cflags': [
   3673                   '-fomit-frame-pointer',
   3674                 ]
   3675               }],
   3676               ['OS=="android"', {
   3677                 'variables': {
   3678                   'release_optimize%': 's',
   3679                 },
   3680                 'ldflags': [
   3681                   # Warn in case of text relocations.
   3682                   '-Wl,--warn-shared-textrel',
   3683                 ],
   3684               }],
   3685               ['profiling==1', {
   3686                 'cflags': [
   3687                   '-fno-omit-frame-pointer',
   3688                   '-g',
   3689                 ],
   3690                 'conditions' : [
   3691                   ['profiling_full_stack_frames==1', {
   3692                     'cflags': [
   3693                       '-fno-inline',
   3694                       '-fno-optimize-sibling-calls',
   3695                     ],
   3696                   }],
   3697                 ],
   3698               }],
   3699               ['release_unwind_tables==1', {
   3700                 'cflags': ['-funwind-tables'],
   3701               }, {
   3702                 'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
   3703               }],
   3704             ],
   3705           },
   3706         },
   3707         'conditions': [
   3708           ['target_arch=="ia32"', {
   3709             'target_conditions': [
   3710               ['_toolset=="target"', {
   3711                 'asflags': [
   3712                   # Needed so that libs with .s files (e.g. libicudata.a)
   3713                   # are compatible with the general 32-bit-ness.
   3714                   '-32',
   3715                 ],
   3716                 # All floating-point computations on x87 happens in 80-bit
   3717                 # precision.  Because the C and C++ language standards allow
   3718                 # the compiler to keep the floating-point values in higher
   3719                 # precision than what's specified in the source and doing so
   3720                 # is more efficient than constantly rounding up to 64-bit or
   3721                 # 32-bit precision as specified in the source, the compiler,
   3722                 # especially in the optimized mode, tries very hard to keep
   3723                 # values in x87 floating-point stack (in 80-bit precision)
   3724                 # as long as possible. This has important side effects, that
   3725                 # the real value used in computation may change depending on
   3726                 # how the compiler did the optimization - that is, the value
   3727                 # kept in 80-bit is different than the value rounded down to
   3728                 # 64-bit or 32-bit. There are possible compiler options to
   3729                 # make this behavior consistent (e.g. -ffloat-store would keep
   3730                 # all floating-values in the memory, thus force them to be
   3731                 # rounded to its original precision) but they have significant
   3732                 # runtime performance penalty.
   3733                 #
   3734                 # -mfpmath=sse -msse2 makes the compiler use SSE instructions
   3735                 # which keep floating-point values in SSE registers in its
   3736                 # native precision (32-bit for single precision, and 64-bit
   3737                 # for double precision values). This means the floating-point
   3738                 # value used during computation does not change depending on
   3739                 # how the compiler optimized the code, since the value is
   3740                 # always kept in its specified precision.
   3741                 #
   3742                 # Refer to http://crbug.com/348761 for rationale behind SSE2
   3743                 # being a minimum requirement for 32-bit Linux builds and
   3744                 # http://crbug.com/313032 for an example where this has "bit"
   3745                 # us in the past.
   3746                 'cflags': [
   3747                   '-msse2',
   3748                   '-mfpmath=sse',
   3749                   '-mmmx',  # Allows mmintrin.h for MMX intrinsics.
   3750                   '-m32',
   3751                 ],
   3752                 'ldflags': [
   3753                   '-m32',
   3754                 ],
   3755                 'conditions': [
   3756                   # Use gold linker for Android ia32 target.
   3757                   ['OS=="android"', {
   3758                     'ldflags': [
   3759                       '-fuse-ld=gold',
   3760                     ],
   3761                   }],
   3762                   # Install packages have started cropping up with
   3763                   # different headers between the 32-bit and 64-bit
   3764                   # versions, so we have to shadow those differences off
   3765                   # and make sure a 32-bit-on-64-bit build picks up the
   3766                   # right files.
   3767                   # For android build, use NDK headers instead of host headers
   3768                   ['host_arch!="ia32" and OS!="android"', {
   3769                     'include_dirs+': [
   3770                       '/usr/include32',
   3771                     ],
   3772                   }],
   3773                 ],
   3774               }],
   3775             ],
   3776           }],
   3777           ['target_arch=="x64"', {
   3778             'target_conditions': [
   3779               ['_toolset=="target"', {
   3780                 'conditions': [
   3781                   # Use gold linker for Android x64 target.
   3782                   ['OS=="android"', {
   3783                     'ldflags': [
   3784                       '-fuse-ld=gold',
   3785                     ],
   3786                   }],
   3787                 ],
   3788                 'cflags': [
   3789                   '-m64',
   3790                   '-march=x86-64',
   3791                 ],
   3792                 'ldflags': [
   3793                   '-m64',
   3794                 ],
   3795               }],
   3796             ],
   3797           }],
   3798           ['target_arch=="arm"', {
   3799             'target_conditions': [
   3800               ['_toolset=="target"', {
   3801                 'conditions': [
   3802                   ['clang==0', {
   3803                     'cflags_cc': [
   3804                       # The codesourcery arm-2009q3 toolchain warns at that the ABI
   3805                       # has changed whenever it encounters a varargs function. This
   3806                       # silences those warnings, as they are not helpful and
   3807                       # clutter legitimate warnings.
   3808                       '-Wno-abi',
   3809                     ],
   3810                   }],
   3811                   ['clang==1 and arm_arch!="" and OS!="android"', {
   3812                     'cflags': [
   3813                       '-target arm-linux-gnueabihf',
   3814                     ],
   3815                     'ldflags': [
   3816                       '-target arm-linux-gnueabihf',
   3817                     ],
   3818                   }],
   3819                   ['arm_arch!=""', {
   3820                     'cflags': [
   3821                       '-march=<(arm_arch)',
   3822                     ],
   3823                   }],
   3824                   ['clang==1 and OS!="android"', {
   3825                     'cflags': [
   3826                       # We need to disable clang's builtin assembler as it can't
   3827                       # handle several asm files, crbug.com/124610
   3828                       '-no-integrated-as',
   3829                     ],
   3830                   }],
   3831                   ['arm_tune!=""', {
   3832                     'cflags': [
   3833                       '-mtune=<(arm_tune)',
   3834                     ],
   3835                   }],
   3836                   ['arm_fpu!=""', {
   3837                     'cflags': [
   3838                       '-mfpu=<(arm_fpu)',
   3839                     ],
   3840                   }],
   3841                   ['arm_float_abi!=""', {
   3842                     'cflags': [
   3843                       '-mfloat-abi=<(arm_float_abi)',
   3844                     ],
   3845                   }],
   3846                   ['arm_thumb==1', {
   3847                     'cflags': [
   3848                       '-mthumb',
   3849                     ],
   3850                   }],
   3851                   ['OS=="android"', {
   3852                     # Most of the following flags are derived from what Android
   3853                     # uses by default when building for arm, reference for which
   3854                     # can be found in the following file in the Android NDK:
   3855                     # toolchains/arm-linux-androideabi-4.9/setup.mk
   3856                     'cflags': [
   3857                       # The tree-sra optimization (scalar replacement for
   3858                       # aggregates enabling subsequent optimizations) leads to
   3859                       # invalid code generation when using the Android NDK's
   3860                       # compiler (r5-r7). This can be verified using
   3861                       # webkit_unit_tests' WTF.Checked_int8_t test.
   3862                       '-fno-tree-sra',
   3863                       # The following option is disabled to improve binary
   3864                       # size and performance in gcc 4.9.
   3865                       '-fno-caller-saves',
   3866                       '-Wno-psabi',
   3867                     ],
   3868                     # Android now supports .relro sections properly.
   3869                     # NOTE: While these flags enable the generation of .relro
   3870                     # sections, the generated libraries can still be loaded on
   3871                     # older Android platform versions.
   3872                     'ldflags': [
   3873                         '-Wl,-z,relro',
   3874                         '-Wl,-z,now',
   3875                         '-fuse-ld=gold',
   3876                     ],
   3877                     'conditions': [
   3878                       ['gcc_version==48 and clang==0', {
   3879                         'cflags': [
   3880                           # The following 5 options are disabled to save on
   3881                           # binary size in GCC 4.8.
   3882                           '-fno-partial-inlining',
   3883                           '-fno-early-inlining',
   3884                           '-fno-tree-copy-prop',
   3885                           '-fno-tree-loop-optimize',
   3886                           '-fno-move-loop-invariants',
   3887                         ],
   3888                       }],
   3889                       ['arm_thumb==1', {
   3890                         'cflags': [ '-mthumb-interwork' ],
   3891                       }],
   3892                       ['profiling==1', {
   3893                         'cflags': [
   3894                           # Thumb code with frame pointer makes chrome crash
   3895                           # early.
   3896                           '-marm',
   3897                           '-mapcs-frame', # Required by -fno-omit-frame-pointer.
   3898                           # The perf report sometimes incorrectly attributes
   3899                           # code from tail calls.
   3900                           '-fno-optimize-sibling-calls',
   3901                         ],
   3902                         'cflags!': [
   3903                           '-fomit-frame-pointer',
   3904                         ],
   3905                       }],
   3906                       ['clang==1', {
   3907                         'cflags!': [
   3908                           # Clang does not support the following options.
   3909                           '-mthumb-interwork',
   3910                           '-finline-limit=64',
   3911                           '-fno-tree-sra',
   3912                           '-fno-caller-saves',
   3913                           '-Wno-psabi',
   3914                         ],
   3915                         'cflags': [
   3916                           # TODO(hans) Enable integrated-as (crbug.com/124610).
   3917                           '-no-integrated-as',
   3918                           '-B<(android_toolchain)',  # Else /usr/bin/as gets picked up.
   3919                         ],
   3920                         'ldflags': [
   3921                           # Let clang find the ld.gold in the NDK.
   3922                           '--gcc-toolchain=<(android_toolchain)/..',
   3923                         ],
   3924                       }],
   3925                       ['asan==1', {
   3926                         'cflags': [
   3927                           '-marm', # Required for frame pointer based stack traces.
   3928                         ],
   3929                       }],
   3930                     ],
   3931                   }],
   3932                   ['chromecast==1', {
   3933                     'cflags': [
   3934                       # We set arm_arch to "" so that -march compiler option
   3935                       # is not set.  Otherwise a gcc bug that would complain
   3936                       # about it conflicting with '-mcpu=cortex-a9'. The flag
   3937                       # '-march=armv7-a' is actually redundant anyway because
   3938                       # it is enabled by default when we built the toolchain.
   3939                       # And using '-mcpu=cortex-a9' should be sufficient.
   3940                       '-mcpu=cortex-a9',
   3941                       '-funwind-tables',
   3942                       # Breakpad requires symbols with debugging information
   3943                       '-g',
   3944                     ],
   3945                     'ldflags': [
   3946                       # We want to statically link libstdc++/libgcc_s.
   3947                       '-static-libstdc++',
   3948                       '-static-libgcc',
   3949                     ],
   3950                     'cflags!': [
   3951                       # Some components in Chromium (e.g. v8, skia, ffmpeg)
   3952                       # define their own cflags for arm builds that could
   3953                       # conflict with the flags we set here (e.g.
   3954                       # '-mcpu=cortex-a9'). Remove these flags explicitly.
   3955                       '-march=armv7-a',
   3956                       '-mtune=cortex-a8',
   3957                     ],
   3958                   }],
   3959                 ],
   3960               }],
   3961             ],
   3962           }],
   3963           ['target_arch=="arm64"', {
   3964             'target_conditions': [
   3965               ['_toolset=="target"', {
   3966                 'conditions': [
   3967                   ['OS=="android"', {
   3968                     'cflags!': [
   3969                        '-fstack-protector',  # stack protector is always enabled on arm64.
   3970                     ],
   3971                   }],
   3972                 ],
   3973               }],
   3974             ],
   3975           }],
   3976           ['target_arch=="mipsel"', {
   3977             'target_conditions': [
   3978               ['_toolset=="target"', {
   3979                 'conditions': [
   3980                   ['android_webview_build==0 and mips_arch_variant=="r6"', {
   3981                     'cflags': ['-mips32r6', '-Wa,-mips32r6'],
   3982                     'conditions': [
   3983                       ['OS=="android"', {
   3984                         'ldflags': ['-mips32r6', '-Wl,-melf32ltsmip',],
   3985                       }],
   3986                     ],
   3987                   }],
   3988                   ['android_webview_build==0 and mips_arch_variant=="r2"', {
   3989                     'cflags': ['-mips32r2', '-Wa,-mips32r2'],
   3990                   }],
   3991                   ['android_webview_build==0 and mips_arch_variant=="r1"', {
   3992                     'cflags': ['-mips32', '-Wa,-mips32'],
   3993                   }],
   3994                 ],
   3995                 'ldflags': [
   3996                   '-Wl,--no-keep-memory'
   3997                 ],
   3998                 'cflags_cc': [
   3999                   '-Wno-uninitialized',
   4000                 ],
   4001               }],
   4002             ],
   4003           }],
   4004           ['target_arch=="mips64el"', {
   4005             'target_conditions': [
   4006               ['_toolset=="target"', {
   4007                 'conditions': [
   4008                   ['android_webview_build==0 and mips_arch_variant=="r6"', {
   4009                     'cflags': ['-mips64r6', '-Wa,-mips64r6'],
   4010                     'ldflags': [ '-mips64r6' ],
   4011                   }],
   4012                   ['android_webview_build==0 and mips_arch_variant=="r2"', {
   4013                     'cflags': ['-mips64r2', '-Wa,-mips64r2'],
   4014                     'ldflags': [ '-mips64r2' ],
   4015                   }],
   4016                 ],
   4017                 'cflags_cc': [
   4018                   '-Wno-uninitialized',
   4019                 ],
   4020               }],
   4021             ],
   4022           }],
   4023           ['linux_fpic==1', {
   4024             'cflags': [
   4025               '-fPIC',
   4026             ],
   4027             'ldflags': [
   4028               '-fPIC',
   4029             ],
   4030           }],
   4031           ['sysroot!=""', {
   4032             'target_conditions': [
   4033               ['_toolset=="target"', {
   4034                 'cflags': [
   4035                   '--sysroot=<(sysroot)',
   4036                 ],
   4037                 'ldflags': [
   4038                   '--sysroot=<(sysroot)',
   4039                   '<!(<(DEPTH)/build/linux/sysroot_ld_path.sh <(sysroot))',
   4040                 ],
   4041               }]]
   4042           }],
   4043           ['clang==1', {
   4044             'cflags': [
   4045               # TODO(thakis): Remove, http://crbug.com/263960
   4046               '-Wno-reserved-user-defined-literal',
   4047             ],
   4048             'cflags_cc': [
   4049               # See the comment in the Mac section for what it takes to move
   4050               # this to -std=c++11.
   4051               '-std=gnu++11',
   4052             ],
   4053           }],
   4054           ['clang==0 and host_clang==1', {
   4055             'target_conditions': [
   4056               ['_toolset=="host"', {
   4057                 'cflags_cc': [ '-std=gnu++11', ],
   4058               }],
   4059             ],
   4060           }],
   4061           ['clang==1 and clang_use_chrome_plugins==1', {
   4062             'cflags': [
   4063               '<@(clang_chrome_plugins_flags)',
   4064             ],
   4065           }],
   4066           ['clang==1 and clang_load!=""', {
   4067             'cflags': [
   4068               '-Xclang', '-load', '-Xclang', '<(clang_load)',
   4069             ],
   4070           }],
   4071           ['clang==1 and clang_add_plugin!=""', {
   4072             'cflags': [
   4073               '-Xclang', '-add-plugin', '-Xclang', '<(clang_add_plugin)',
   4074             ],
   4075           }],
   4076           ['clang==1 and target_arch=="ia32"', {
   4077             'cflags': [
   4078               # Else building libyuv gives clang's register allocator issues,
   4079               # see llvm.org/PR15798 / crbug.com/233709
   4080               '-momit-leaf-frame-pointer',
   4081               # Align the stack on 16-byte boundaries, http://crbug.com/418554.
   4082               '-mstack-alignment=16',
   4083               '-mstackrealign',
   4084             ],
   4085           }],
   4086           ['clang==1 and "<(GENERATOR)"=="ninja"', {
   4087             'cflags': [
   4088               # See http://crbug.com/110262
   4089               '-fcolor-diagnostics',
   4090             ],
   4091           }],
   4092           # Common options for AddressSanitizer, LeakSanitizer,
   4093           # ThreadSanitizer and MemorySanitizer.
   4094           ['asan==1 or lsan==1 or tsan==1 or msan==1 or ubsan==1 or ubsan_vptr==1', {
   4095             'target_conditions': [
   4096               ['_toolset=="target"', {
   4097                 'cflags': [
   4098                   '-fno-omit-frame-pointer',
   4099                   '-gline-tables-only',
   4100                 ],
   4101                 'cflags!': [
   4102                   '-fomit-frame-pointer',
   4103                 ],
   4104               }],
   4105             ],
   4106           }],
   4107           ['asan==1 or lsan==1 or tsan==1 or msan==1', {
   4108             'target_conditions': [
   4109               ['_toolset=="target"', {
   4110                 'ldflags!': [
   4111                   # Functions interposed by the sanitizers can make ld think
   4112                   # that some libraries aren't needed when they actually are,
   4113                   # http://crbug.com/234010. As workaround, disable --as-needed.
   4114                   '-Wl,--as-needed',
   4115                 ],
   4116                 'defines': [
   4117                   'MEMORY_TOOL_REPLACES_ALLOCATOR',
   4118                   'MEMORY_SANITIZER_INITIAL_SIZE',
   4119                 ],
   4120               }],
   4121             ],
   4122           }],
   4123           ['asan==1', {
   4124             'target_conditions': [
   4125               ['_toolset=="target"', {
   4126                 'cflags': [
   4127                   '-fsanitize=address',
   4128                 ],
   4129                 'ldflags': [
   4130                   '-fsanitize=address',
   4131                 ],
   4132               }],
   4133             ],
   4134             'conditions': [
   4135               ['OS=="mac"', {
   4136                 'cflags': [
   4137                   '-mllvm -asan-globals=0',  # http://crbug.com/352073
   4138                 ],
   4139               }],
   4140             ],
   4141           }],
   4142           ['ubsan==1', {
   4143             'target_conditions': [
   4144               ['_toolset=="target"', {
   4145                 'cflags': [
   4146                   '-fsanitize=undefined',
   4147                   # -fsanitize=vptr is incompatible with -fno-rtti.
   4148                   '-fno-sanitize=vptr',
   4149                 ],
   4150                 'ldflags': [
   4151                   '-fsanitize=undefined',
   4152                   # -fsanitize=vptr is incompatible with -fno-rtti.
   4153                   '-fno-sanitize=vptr',
   4154                 ],
   4155               }],
   4156             ],
   4157           }],
   4158           ['ubsan_vptr==1', {
   4159             'target_conditions': [
   4160               ['_toolset=="target"', {
   4161                 'cflags': [
   4162                   '-fsanitize=vptr',
   4163                   '-fsanitize-blacklist=<(ubsan_vptr_blacklist)',
   4164                 ],
   4165                 'cflags_cc!': [
   4166                   '-fno-rtti',
   4167                 ],
   4168                 'cflags!': [
   4169                   '-fno-rtti',
   4170                 ],
   4171                 'ldflags': [
   4172                   '-fsanitize=vptr',
   4173                 ],
   4174                 'defines': [
   4175                   'UNDEFINED_SANITIZER',
   4176                 ],
   4177               }],
   4178             ],
   4179           }],
   4180           ['asan_coverage!=0', {
   4181             'target_conditions': [
   4182               ['_toolset=="target"', {
   4183                 'cflags': [
   4184                   '-mllvm -asan-coverage=<(asan_coverage)',
   4185                 ],
   4186               }],
   4187             ],
   4188           }],
   4189           ['lsan==1', {
   4190             'target_conditions': [
   4191               ['_toolset=="target"', {
   4192                 'cflags': [
   4193                   '-fsanitize=leak',
   4194                 ],
   4195                 'ldflags': [
   4196                   '-fsanitize=leak',
   4197                 ],
   4198                 'defines': [
   4199                   'LEAK_SANITIZER',
   4200                   'WTF_USE_LEAK_SANITIZER=1',
   4201                 ],
   4202               }],
   4203             ],
   4204           }],
   4205           ['tsan==1', {
   4206             'target_conditions': [
   4207               ['_toolset=="target"', {
   4208                 'cflags': [
   4209                   '-fsanitize=thread',
   4210                   '-fPIC',
   4211                   '-fsanitize-blacklist=<(tsan_blacklist)',
   4212                 ],
   4213                 'ldflags': [
   4214                   '-fsanitize=thread',
   4215                 ],
   4216                 'defines': [
   4217                   'THREAD_SANITIZER',
   4218                   'DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL=1',
   4219                   'WTF_USE_DYNAMIC_ANNOTATIONS_NOIMPL=1',
   4220                 ],
   4221                 'target_conditions': [
   4222                   ['_type=="executable"', {
   4223                     'ldflags': [
   4224                       '-pie',
   4225                     ],
   4226                   }],
   4227                 ],
   4228               }],
   4229             ],
   4230           }],
   4231           ['msan==1', {
   4232             'target_conditions': [
   4233               ['_toolset=="target"', {
   4234                 'cflags': [
   4235                   '-fsanitize=memory',
   4236                   '-fsanitize-memory-track-origins=<(msan_track_origins)',
   4237                   '-fPIC',
   4238                   '-fsanitize-blacklist=<(msan_blacklist)',
   4239                 ],
   4240                 'ldflags': [
   4241                   '-fsanitize=memory',
   4242                 ],
   4243                 'defines': [
   4244                   'MEMORY_SANITIZER',
   4245                 ],
   4246                 'target_conditions': [
   4247                   ['_type=="executable"', {
   4248                     'ldflags': [
   4249                       '-pie',
   4250                     ],
   4251                   }],
   4252                 ],
   4253               }],
   4254             ],
   4255           }],
   4256           ['use_instrumented_libraries==1', {
   4257             'dependencies': [
   4258               '<(DEPTH)/third_party/instrumented_libraries/instrumented_libraries.gyp:instrumented_libraries',
   4259             ],
   4260           }],
   4261           ['use_custom_libcxx==1', {
   4262             'dependencies': [
   4263               '<(DEPTH)/third_party/libc++/libc++.gyp:libcxx_proxy',
   4264             ],
   4265           }],
   4266           ['order_profiling!=0 and (chromeos==1 or OS=="linux" or OS=="android")', {
   4267             'target_conditions' : [
   4268               # crazy_linker has an upstream gyp file we can't edit, and we
   4269               # don't want to instrument it.
   4270               ['_toolset=="target" and _target_name!="crazy_linker"', {
   4271                 'cflags': [
   4272                   '-finstrument-functions',
   4273                   # Allow mmx intrinsics to inline, so that the
   4274                   #0 compiler can expand the intrinsics.
   4275                   '-finstrument-functions-exclude-file-list=mmintrin.h',
   4276                 ],
   4277               }],
   4278               ['_toolset=="target" and OS=="android"', {
   4279                 'cflags': [
   4280                   # Avoids errors with current NDK:
   4281                   # "third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/include/arm_neon.h:3426:3: error: argument must be a constant"
   4282                   '-finstrument-functions-exclude-file-list=arm_neon.h,SaturatedArithmeticARM.h',
   4283                 ],
   4284               }],
   4285             ],
   4286           }],
   4287           ['linux_dump_symbols==1', {
   4288             'cflags': [ '-g' ],
   4289             'conditions': [
   4290               ['OS=="linux" and host_arch=="ia32" and linux_use_bundled_gold==0', {
   4291                 'target_conditions': [
   4292                   ['_toolset=="target"', {
   4293                     'ldflags': [
   4294                       # Attempt to use less memory to prevent the linker from
   4295                       # running out of address space. Considering installing a
   4296                       # 64-bit kernel and switching to a 64-bit linker.
   4297                       '-Wl,--no-keep-memory',
   4298                     ],
   4299                   }],
   4300                 ],
   4301               }],
   4302             ],
   4303           }],
   4304           ['use_allocator!="tcmalloc"', {
   4305             'defines': ['NO_TCMALLOC'],
   4306           }],
   4307           ['linux_use_gold_flags==1', {
   4308             # Newer gccs and clangs support -fuse-ld, use the flag to force gold
   4309             # selection.
   4310             # gcc -- http://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Optimize-Options.html
   4311             'ldflags': [ '-fuse-ld=gold', ],
   4312 
   4313             'target_conditions': [
   4314               ['_toolset=="target"', {
   4315                 'ldflags': [
   4316                   # Experimentation found that using four linking threads
   4317                   # saved ~20% of link time.
   4318                   # https://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/281527606915bb36
   4319                   # Only apply this to the target linker, since the host
   4320                   # linker might not be gold, but isn't used much anyway.
   4321                   # TODO(raymes): Disable threading because gold is frequently
   4322                   # crashing on the bots: crbug.com/161942.
   4323                   # '-Wl,--threads',
   4324                   # '-Wl,--thread-count=4',
   4325                 ],
   4326               }],
   4327             ],
   4328             'conditions': [
   4329               ['release_valgrind_build==0', {
   4330                 'target_conditions': [
   4331                   ['_toolset=="target"', {
   4332                     'ldflags': [
   4333                       '-Wl,--icf=safe',
   4334                     ],
   4335                   }],
   4336                 ],
   4337               }],
   4338             ],
   4339           }],
   4340           ['linux_use_bundled_binutils==1', {
   4341             'cflags': [
   4342               '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
   4343             ],
   4344           }],
   4345           ['linux_use_bundled_gold==1', {
   4346             # Put our binutils, which contains gold in the search path. We pass
   4347             # the path to gold to the compiler. gyp leaves unspecified what the
   4348             # cwd is when running the compiler, so the normal gyp path-munging
   4349             # fails us. This hack gets the right path.
   4350             'ldflags': [
   4351               '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
   4352             ],
   4353           }],
   4354           # Some binutils 2.23 releases may or may not have new dtags enabled,
   4355           # but they are all compatible with --disable-new-dtags,
   4356           # because the new dynamic tags are not created by default.
   4357           ['binutils_version>=223', {
   4358             # Newer binutils don't set DT_RPATH unless you disable "new" dtags
   4359             # and the new DT_RUNPATH doesn't work without --no-as-needed flag.
   4360             # FIXME(mithro): Figure out the --as-needed/--no-as-needed flags
   4361             # inside this file to allow usage of --no-as-needed and removal of
   4362             # this flag.
   4363             'ldflags': [
   4364               '-Wl,--disable-new-dtags',
   4365             ],
   4366           }],
   4367           ['gcc_version>=47 and clang==0', {
   4368             'target_conditions': [
   4369               ['_toolset=="target"', {
   4370                 'cflags_cc': [
   4371                   '-std=gnu++11',
   4372                   # See comment for -Wno-c++11-narrowing.
   4373                   '-Wno-narrowing',
   4374                   # TODO(thakis): Remove, http://crbug.com/263960
   4375                   '-Wno-literal-suffix',
   4376                 ],
   4377               }],
   4378             ],
   4379           }],
   4380           ['host_gcc_version>=47 and clang==0 and host_clang==0', {
   4381             'target_conditions': [
   4382               ['_toolset=="host"', {
   4383                 'cflags_cc': [
   4384                   '-std=gnu++11',
   4385                   # See comment for -Wno-c++11-narrowing.
   4386                   '-Wno-narrowing',
   4387                   # TODO(thakis): Remove, http://crbug.com/263960
   4388                   '-Wno-literal-suffix',
   4389                 ],
   4390               }],
   4391             ],
   4392           }],
   4393         ],
   4394       },
   4395     }],
   4396     # FreeBSD-specific options; note that most FreeBSD options are set above,
   4397     # with Linux.
   4398     ['OS=="freebsd"', {
   4399       'target_defaults': {
   4400         'ldflags': [
   4401           '-Wl,--no-keep-memory',
   4402         ],
   4403       },
   4404     }],
   4405     # Android-specific options; note that most are set above with Linux.
   4406     ['OS=="android"', {
   4407       'variables': {
   4408         # This is a unique identifier for a given build. It's used for
   4409         # identifying various build artifacts corresponding to a particular
   4410         # build of chrome (e.g. where to find archived symbols).
   4411         'chrome_build_id%': '',
   4412         'conditions': [
   4413           # Use shared stlport library when system one used.
   4414           # Figure this out early since it needs symbols from libgcc.a, so it
   4415           # has to be before that in the set of libraries.
   4416           ['use_system_stlport==1', {
   4417             'android_stlport_library': 'stlport',
   4418           }, {
   4419             'conditions': [
   4420               ['component=="shared_library"', {
   4421                   'android_stlport_library': 'stlport_shared',
   4422               }, {
   4423                   'android_stlport_library': 'stlport_static',
   4424               }],
   4425             ],
   4426           }],
   4427         ],
   4428 
   4429         # Placing this variable here prevents from forking libvpx, used
   4430         # by remoting.  Remoting is off, so it needn't built,
   4431         # so forking it's deps seems like overkill.
   4432         # But this variable need defined to properly run gyp.
   4433         # A proper solution is to have an OS==android conditional
   4434         # in third_party/libvpx/libvpx.gyp to define it.
   4435         'libvpx_path': 'lib/linux/arm',
   4436       },
   4437       'target_defaults': {
   4438         'variables': {
   4439           'release_extra_cflags%': '',
   4440           'conditions': [
   4441             # If we're using the components build, append "cr" to all shared
   4442             # libraries to avoid naming collisions with android system library
   4443             # versions with the same name (e.g. skia, icu).
   4444             ['component=="shared_library"', {
   4445               'android_product_extension': 'cr.so',
   4446             }, {
   4447               'android_product_extension': 'so',
   4448             } ],
   4449           ],
   4450         },
   4451         'target_conditions': [
   4452           ['_type=="shared_library"', {
   4453             'product_extension': '<(android_product_extension)',
   4454           }],
   4455 
   4456           # Settings for building device targets using Android's toolchain.
   4457           # These are based on the setup.mk file from the Android NDK.
   4458           #
   4459           # The NDK Android executable link step looks as follows:
   4460           #  $LDFLAGS
   4461           #  $(TARGET_CRTBEGIN_DYNAMIC_O)  <-- crtbegin.o
   4462           #  $(PRIVATE_OBJECTS)            <-- The .o that we built
   4463           #  $(PRIVATE_STATIC_LIBRARIES)   <-- The .a that we built
   4464           #  $(TARGET_LIBGCC)              <-- libgcc.a
   4465           #  $(PRIVATE_SHARED_LIBRARIES)   <-- The .so that we built
   4466           #  $(PRIVATE_LDLIBS)             <-- System .so
   4467           #  $(TARGET_CRTEND_O)            <-- crtend.o
   4468           #
   4469           # For now the above are approximated for executables by adding
   4470           # crtbegin.o to the end of the ldflags and 'crtend.o' to the end
   4471           # of 'libraries'.
   4472           #
   4473           # The NDK Android shared library link step looks as follows:
   4474           #  $LDFLAGS
   4475           #  $(PRIVATE_OBJECTS)            <-- The .o that we built
   4476           #  -l,--whole-archive
   4477           #  $(PRIVATE_WHOLE_STATIC_LIBRARIES)
   4478           #  -l,--no-whole-archive
   4479           #  $(PRIVATE_STATIC_LIBRARIES)   <-- The .a that we built
   4480           #  $(TARGET_LIBGCC)              <-- libgcc.a
   4481           #  $(PRIVATE_SHARED_LIBRARIES)   <-- The .so that we built
   4482           #  $(PRIVATE_LDLIBS)             <-- System .so
   4483           #
   4484           # For now, assume that whole static libraries are not needed.
   4485           #
   4486           # For both executables and shared libraries, add the proper
   4487           # libgcc.a to the start of libraries which puts it in the
   4488           # proper spot after .o and .a files get linked in.
   4489           #
   4490           # TODO: The proper thing to do longer-tem would be proper gyp
   4491           # support for a custom link command line.
   4492           ['_toolset=="target"', {
   4493             'cflags!': [
   4494               '-pthread',  # Not supported by Android toolchain.
   4495             ],
   4496             'cflags': [
   4497               '-ffunction-sections',
   4498               '-funwind-tables',
   4499               '-g',
   4500               '-fstack-protector',
   4501               '-fno-short-enums',
   4502               '-finline-limit=64',
   4503               '-Wa,--noexecstack',
   4504               '<@(release_extra_cflags)',
   4505             ],
   4506             'defines': [
   4507               'ANDROID',
   4508               '__GNU_SOURCE=1',  # Necessary for clone()
   4509               'USE_STLPORT=1',
   4510               '_STLP_USE_PTR_SPECIALIZATIONS=1',
   4511               'CHROME_BUILD_ID="<(chrome_build_id)"',
   4512             ],
   4513             'ldflags!': [
   4514               '-pthread',  # Not supported by Android toolchain.
   4515             ],
   4516             'ldflags': [
   4517               '-nostdlib',
   4518               '-Wl,--no-undefined',
   4519             ],
   4520             'libraries': [
   4521               '-l<(android_stlport_library)',
   4522               # Manually link the libgcc.a that the cross compiler uses.
   4523               '<!(<(android_toolchain)/*-gcc -print-libgcc-file-name)',
   4524               '-lc',
   4525               '-ldl',
   4526               '-lm',
   4527             ],
   4528             'conditions': [
   4529               ['component=="static_library"', {
   4530                 'ldflags': [
   4531                   '-Wl,--exclude-libs=ALL',
   4532                 ],
   4533               }],
   4534               ['clang==1', {
   4535                 'cflags': [
   4536                   # Work around incompatibilities between bionic and clang
   4537                   # headers.
   4538                   '-D__compiler_offsetof=__builtin_offsetof',
   4539                   '-Dnan=__builtin_nan',
   4540                 ],
   4541                 'conditions': [
   4542                   ['target_arch=="arm"', {
   4543                     'cflags': [
   4544                       '-target arm-linux-androideabi',
   4545                     ],
   4546                     'ldflags': [
   4547                       '-target arm-linux-androideabi',
   4548                     ],
   4549                   }],
   4550                   ['target_arch=="ia32"', {
   4551                     'cflags': [
   4552                       '-target x86-linux-androideabi',
   4553                     ],
   4554                     'ldflags': [
   4555                       '-target x86-linux-androideabi',
   4556                     ],
   4557                   }],
   4558                   # Place holder for x64 support, not tested.
   4559                   # TODO: Enable clang support for Android x64. http://crbug.com/346626
   4560                   ['target_arch=="x64"', {
   4561                     'cflags': [
   4562                       '-target x86_64-linux-androideabi',
   4563                     ],
   4564                     'ldflags': [
   4565                       '-target x86_64-linux-androideabi',
   4566                     ],
   4567                   }],
   4568                 ],
   4569               }],
   4570               ['asan==1', {
   4571                 'cflags': [
   4572                   # Android build relies on -Wl,--gc-sections removing
   4573                   # unreachable code. ASan instrumentation for globals inhibits
   4574                   # this and results in a library with unresolvable relocations.
   4575                   # TODO(eugenis): find a way to reenable this.
   4576                   '-mllvm -asan-globals=0',
   4577                 ],
   4578               }],
   4579               ['android_webview_build==0', {
   4580                 'defines': [
   4581                   # The NDK has these things, but doesn't define the constants
   4582                   # to say that it does. Define them here instead.
   4583                   'HAVE_SYS_UIO_H',
   4584                 ],
   4585                 'cflags': [
   4586                   '--sysroot=<(android_ndk_sysroot)',
   4587                 ],
   4588                 'ldflags': [
   4589                   '--sysroot=<(android_ndk_sysroot)',
   4590                 ],
   4591               }],
   4592               ['android_webview_build==1', {
   4593                 'include_dirs': [
   4594                   # OpenAL headers from the Android tree.
   4595                   '<(android_src)/frameworks/wilhelm/include',
   4596                 ],
   4597                 'cflags': [
   4598                   # Android predefines this as 1; undefine it here so Chromium
   4599                   # can redefine it later to be 2 for chromium code and unset
   4600                   # for third party code. This works because cflags are added
   4601                   # before defines.
   4602                   '-U_FORTIFY_SOURCE',
   4603                   # Disable any additional warnings enabled by the Android build system but which
   4604                   # chromium does not build cleanly with (when treating warning as errors).
   4605                   # Things that are part of -Wextra:
   4606                   '-Wno-extra', # Enabled by -Wextra, but no specific flag
   4607                   '-Wno-ignored-qualifiers',
   4608                   '-Wno-type-limits',
   4609                   '-Wno-unused-but-set-variable',
   4610                 ],
   4611                 'cflags_cc': [
   4612                   # Other things unrelated to -Wextra:
   4613                   '-Wno-non-virtual-dtor',
   4614                   '-Wno-sign-promo',
   4615                 ],
   4616               }],
   4617               ['android_webview_build==1', {
   4618                 'target_conditions': [
   4619                   ['chromium_code==0', {
   4620                     'cflags': [
   4621                       # There is a class of warning which:
   4622                       #  1) Android always enables and also treats as errors
   4623                       #  2) Chromium ignores in third party code
   4624                       # So we re-enable those warnings when building Android.
   4625                       '-Wno-address',
   4626                       '-Wno-format-security',
   4627                       '-Wno-return-type',
   4628                       '-Wno-sequence-point',
   4629                     ],
   4630                     'cflags_cc': [
   4631                       '-Wno-non-virtual-dtor',
   4632                     ],
   4633                   }],
   4634                 ],
   4635               }],
   4636               ['target_arch == "arm"', {
   4637                 'ldflags': [
   4638                   # Enable identical code folding to reduce size.
   4639                   '-Wl,--icf=safe',
   4640                 ],
   4641               }],
   4642               # NOTE: The stlport header include paths below are specified in
   4643               # cflags rather than include_dirs because they need to come
   4644               # after include_dirs. Think of them like system headers, but
   4645               # don't use '-isystem' because the arm-linux-androideabi-4.4.3
   4646               # toolchain (circa Gingerbread) will exhibit strange errors.
   4647               # The include ordering here is important; change with caution.
   4648               ['use_system_stlport==1', {
   4649                 'cflags': [
   4650                   # For libstdc++/include, which is used by stlport.
   4651                   '-I<(android_src)/bionic',
   4652                   '-I<(android_src)/external/stlport/stlport',
   4653                 ],
   4654               }, { # else: use_system_stlport!=1
   4655                 'cflags': [
   4656                   '-isystem<(android_stlport_include)',
   4657                 ],
   4658                 'ldflags': [
   4659                   '-L<(android_stlport_libs_dir)',
   4660                 ],
   4661               }],
   4662               ['target_arch=="ia32"', {
   4663                 # The x86 toolchain currently has problems with stack-protector.
   4664                 'cflags!': [
   4665                   '-fstack-protector',
   4666                 ],
   4667                 'cflags': [
   4668                   '-fno-stack-protector',
   4669                 ],
   4670               }],
   4671             ],
   4672             'target_conditions': [
   4673               ['_type=="executable"', {
   4674                 # Force android tools to export the "main" symbol so they can be
   4675                 # loaded on ICS using the run_pie wrapper. See crbug.com/373219.
   4676                 # TODO(primiano): remove -fvisibility and -rdynamic flags below
   4677                 # when ICS support will be dropped.
   4678                 'cflags': [
   4679                   '-fPIE',
   4680                   '-fvisibility=default',
   4681                 ],
   4682                 'ldflags': [
   4683                   '-Bdynamic',
   4684                   '-Wl,--gc-sections',
   4685                   '-Wl,-z,nocopyreloc',
   4686                   '-pie',
   4687                   '-rdynamic',
   4688                   # crtbegin_dynamic.o should be the last item in ldflags.
   4689                   '<(android_ndk_lib)/crtbegin_dynamic.o',
   4690                 ],
   4691                 'libraries': [
   4692                   # crtend_android.o needs to be the last item in libraries.
   4693                   # Do not add any libraries after this!
   4694                   '<(android_ndk_lib)/crtend_android.o',
   4695                 ],
   4696               }],
   4697               ['_type=="shared_library" or _type=="loadable_module"', {
   4698                 'ldflags!': [
   4699                   '-Wl,--exclude-libs=ALL',
   4700                 ],
   4701                 'ldflags': [
   4702                   '-Wl,-shared,-Bsymbolic',
   4703                 ],
   4704                 'conditions': [
   4705                   ['android_webview_build==0', {
   4706                     'ldflags': [
   4707                       # crtbegin_so.o should be the last item in ldflags.
   4708                       '<(android_ndk_lib)/crtbegin_so.o',
   4709                     ],
   4710                     'libraries': [
   4711                       # crtend_so.o needs to be the last item in libraries.
   4712                       # Do not add any libraries after this!
   4713                       '<(android_ndk_lib)/crtend_so.o',
   4714                     ],
   4715                   }],
   4716                 ],
   4717               }],
   4718             ],
   4719           }],
   4720           # Settings for building host targets using the system toolchain.
   4721           ['_toolset=="host"', {
   4722             'cflags!': [
   4723               # Due to issues in Clang build system, using ASan on 32-bit
   4724               # binaries on x86_64 host is problematic.
   4725               # TODO(eugenis): re-enable.
   4726               '-fsanitize=address',
   4727             ],
   4728             'ldflags!': [
   4729               '-fsanitize=address',
   4730               '-Wl,-z,noexecstack',
   4731               '-Wl,--gc-sections',
   4732               '-Wl,-O1',
   4733               '-Wl,--as-needed',
   4734               '-Wl,--warn-shared-textrel',
   4735               '-Wl,--fatal-warnings',
   4736             ],
   4737           }],
   4738           # Settings for building host targets on mac.
   4739           ['_toolset=="host" and host_os=="mac"', {
   4740             'ldflags!': [
   4741               '-Wl,-z,now',
   4742               '-Wl,-z,relro',
   4743             ],
   4744           }],
   4745         ],
   4746       },
   4747     }],
   4748     ['OS=="solaris"', {
   4749       'cflags!': ['-fvisibility=hidden'],
   4750       'cflags_cc!': ['-fvisibility-inlines-hidden'],
   4751     }],
   4752     ['OS=="mac" or OS=="ios"', {
   4753       'target_defaults': {
   4754         'mac_bundle': 0,
   4755         'xcode_settings': {
   4756           'ALWAYS_SEARCH_USER_PATHS': 'NO',
   4757           # Don't link in libarclite_macosx.a, see http://crbug.com/156530.
   4758           'CLANG_LINK_OBJC_RUNTIME': 'NO',          # -fno-objc-link-runtime
   4759           'COPY_PHASE_STRIP': 'NO',
   4760           'GCC_C_LANGUAGE_STANDARD': 'c99',         # -std=c99
   4761           'GCC_CW_ASM_SYNTAX': 'NO',                # No -fasm-blocks
   4762           'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',        # -fno-exceptions
   4763           'GCC_ENABLE_CPP_RTTI': 'NO',              # -fno-rtti
   4764           'GCC_ENABLE_PASCAL_STRINGS': 'NO',        # No -mpascal-strings
   4765           # GCC_INLINES_ARE_PRIVATE_EXTERN maps to -fvisibility-inlines-hidden
   4766           'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
   4767           'GCC_OBJC_CALL_CXX_CDTORS': 'YES',        # -fobjc-call-cxx-cdtors
   4768           'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',      # -fvisibility=hidden
   4769           'GCC_THREADSAFE_STATICS': 'NO',           # -fno-threadsafe-statics
   4770           'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',    # -Werror
   4771           'GCC_VERSION': '4.2',
   4772           'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES',  # -Wnewline-eof
   4773           'USE_HEADERMAP': 'NO',
   4774           'WARNING_CFLAGS': [
   4775             '-Wall',
   4776             '-Wendif-labels',
   4777             '-Wextra',
   4778             # Don't warn about unused function parameters.
   4779             '-Wno-unused-parameter',
   4780             # Don't warn about the "struct foo f = {0};" initialization
   4781             # pattern.
   4782             '-Wno-missing-field-initializers',
   4783           ],
   4784           'conditions': [
   4785             ['chromium_mac_pch', {'GCC_PRECOMPILE_PREFIX_HEADER': 'YES'},
   4786                                  {'GCC_PRECOMPILE_PREFIX_HEADER': 'NO'}
   4787             ],
   4788             # Note that the prebuilt Clang binaries should not be used for iOS
   4789             # development except for ASan builds.
   4790             ['clang==1', {
   4791               # gnu++11 instead of c++11 is needed because some code uses
   4792               # typeof() (a GNU extension).
   4793               # TODO(thakis): Eventually switch this to c++11 instead of
   4794               # gnu++11 (once typeof can be removed, which is blocked on c++11
   4795               # being available everywhere).
   4796               'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++11',  # -std=gnu++11
   4797               # Warn if automatic synthesis is triggered with
   4798               # the -Wobjc-missing-property-synthesis flag.
   4799               'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'YES',
   4800               'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
   4801               'WARNING_CFLAGS': [
   4802                 # This warns on selectors from Cocoa headers (-length, -set).
   4803                 # cfe-dev is currently discussing the merits of this warning.
   4804                 # TODO(thakis): Reevaluate what to do with this, based one
   4805                 # cfe-dev discussion.
   4806                 '-Wno-selector-type-mismatch',
   4807               ],
   4808               'conditions': [
   4809                 ['clang_xcode==0', {
   4810                   'CC': '$(SOURCE_ROOT)/<(clang_dir)/clang',
   4811                   'LDPLUSPLUS': '$(SOURCE_ROOT)/<(clang_dir)/clang++',
   4812                 }],
   4813               ],
   4814             }],
   4815             ['clang==1 and clang_xcode==0 and clang_use_chrome_plugins==1', {
   4816               'OTHER_CFLAGS': [
   4817                 '<@(clang_chrome_plugins_flags)',
   4818               ],
   4819             }],
   4820             ['clang==1 and clang_xcode==0 and clang_load!=""', {
   4821               'OTHER_CFLAGS': [
   4822                 '-Xclang', '-load', '-Xclang', '<(clang_load)',
   4823               ],
   4824             }],
   4825             ['clang==1 and clang_xcode==0 and clang_add_plugin!=""', {
   4826               'OTHER_CFLAGS': [
   4827                 '-Xclang', '-add-plugin', '-Xclang', '<(clang_add_plugin)',
   4828               ],
   4829             }],
   4830             ['clang==1 and "<(GENERATOR)"=="ninja"', {
   4831               'OTHER_CFLAGS': [
   4832                 # See http://crbug.com/110262
   4833                 '-fcolor-diagnostics',
   4834               ],
   4835             }],
   4836             ['OS=="ios" and target_subarch!="arm32" and \
   4837               "<(GENERATOR)"=="xcode"', {
   4838               'OTHER_CFLAGS': [
   4839                 # TODO(ios): when building Chrome for iOS on 64-bit platform
   4840                 # with Xcode, the -Wshorted-64-to-32 warning is automatically
   4841                 # enabled. This cause failures when compiling protobuf code,
   4842                 # so disable the warning. http://crbug.com/359107
   4843                 '-Wno-shorten-64-to-32',
   4844               ],
   4845             }],
   4846           ],
   4847         },
   4848         'conditions': [
   4849           ['clang==1', {
   4850             'variables': {
   4851               'clang_dir': '../third_party/llvm-build/Release+Asserts/bin',
   4852             },
   4853           }],
   4854           ['asan==1', {
   4855             'xcode_settings': {
   4856               'OTHER_CFLAGS': [
   4857                 '-fsanitize=address',
   4858                 '-mllvm -asan-globals=0',  # http://crbug.com/352073
   4859                 '-gline-tables-only',
   4860               ],
   4861             },
   4862           }],
   4863           ['asan_coverage!=0', {
   4864             'target_conditions': [
   4865               ['_toolset=="target"', {
   4866                 'cflags': [
   4867                   '-mllvm -asan-coverage=<(asan_coverage)',
   4868                 ],
   4869               }],
   4870             ],
   4871           }],
   4872         ],
   4873         'target_conditions': [
   4874           ['_type!="static_library"', {
   4875             'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},
   4876             'conditions': [
   4877               ['asan==1', {
   4878                 'xcode_settings': {
   4879                   'OTHER_LDFLAGS': [
   4880                     '-fsanitize=address',
   4881                   ],
   4882                 },
   4883               }],
   4884               ['mac_write_linker_maps==1', {
   4885                 'xcode_settings': {
   4886                   'OTHER_LDFLAGS': [
   4887                     '-Wl,-map,>(_target_name).map',
   4888                   ],
   4889                 },
   4890               }],
   4891             ],
   4892           }],
   4893           ['_mac_bundle', {
   4894             'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
   4895             'target_conditions': [
   4896               ['_type=="executable"', {
   4897                 'conditions': [
   4898                   ['asan==1', {
   4899                     'postbuilds': [
   4900                       {
   4901                         'variables': {
   4902                           # Define copy_asan_dylib_path in a variable ending in
   4903                           # _path so that gyp understands it's a path and
   4904                           # performs proper relativization during dict merging.
   4905                           'copy_asan_dylib_path':
   4906                             'mac/copy_asan_runtime_dylib.sh',
   4907                         },
   4908                         'postbuild_name': 'Copy ASan runtime dylib',
   4909                         'action': [
   4910                           '<(copy_asan_dylib_path)',
   4911                         ],
   4912                       },
   4913                     ],
   4914                   }],
   4915                 ],
   4916               }],
   4917             ],
   4918           }],
   4919         ],  # target_conditions
   4920       },  # target_defaults
   4921     }],  # OS=="mac" or OS=="ios"
   4922     ['OS=="mac"', {
   4923       'target_defaults': {
   4924         'defines': [
   4925           # Prevent Mac OS X AssertMacros.h from defining macros that collide
   4926           # with common names, like 'check', 'require', and 'verify'.
   4927           # (Included by system header. Also exists on iOS but not included.)
   4928           # http://opensource.apple.com/source/CarbonHeaders/CarbonHeaders-18.1/AssertMacros.h
   4929           '__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0',
   4930         ],
   4931         'variables': {
   4932           # These should end with %, but there seems to be a bug with % in
   4933           # variables that are intended to be set to different values in
   4934           # different targets, like these.
   4935           'mac_pie': 1,        # Most executables can be position-independent.
   4936           # Strip debugging symbols from the target.
   4937           'mac_strip': '<(mac_strip_release)',
   4938           'conditions': [
   4939             ['asan==1', {
   4940               'conditions': [
   4941                 ['mac_want_real_dsym=="default"', {
   4942                   'mac_real_dsym': 1,
   4943                 }, {
   4944                   'mac_real_dsym': '<(mac_want_real_dsym)'
   4945                 }],
   4946               ],
   4947             }, {
   4948               'conditions': [
   4949                 ['mac_want_real_dsym=="default"', {
   4950                   'mac_real_dsym': 0, # Fake .dSYMs are fine in most cases.
   4951                 }, {
   4952                   'mac_real_dsym': '<(mac_want_real_dsym)'
   4953                 }],
   4954               ],
   4955             }],
   4956           ],
   4957         },
   4958         'xcode_settings': {
   4959           'GCC_DYNAMIC_NO_PIC': 'NO',               # No -mdynamic-no-pic
   4960                                                     # (Equivalent to -fPIC)
   4961           # MACOSX_DEPLOYMENT_TARGET maps to -mmacosx-version-min
   4962           'MACOSX_DEPLOYMENT_TARGET': '<(mac_deployment_target)',
   4963           # Keep pch files below xcodebuild/.
   4964           'SHARED_PRECOMPS_DIR': '$(CONFIGURATION_BUILD_DIR)/SharedPrecompiledHeaders',
   4965           'OTHER_CFLAGS': [
   4966             # Someday this can be replaced by an 'GCC_STRICT_ALIASING': 'NO'
   4967             # xcode_setting, but not until all downstream projects' mac bots are
   4968             # using xcode >= 4.6, because that's when the default value of the
   4969             # flag in the compiler switched.  Pre-4.6, the value 'NO' for that
   4970             # setting is a no-op as far as xcode is concerned, but the compiler
   4971             # behaves differently based on whether -fno-strict-aliasing is
   4972             # specified or not.
   4973             '-fno-strict-aliasing',  # See http://crbug.com/32204.
   4974           ],
   4975         },
   4976         'target_conditions': [
   4977           ['_type=="executable"', {
   4978             'postbuilds': [
   4979               {
   4980                 # Arranges for data (heap) pages to be protected against
   4981                 # code execution when running on Mac OS X 10.7 ("Lion"), and
   4982                 # ensures that the position-independent executable (PIE) bit
   4983                 # is set for ASLR when running on Mac OS X 10.5 ("Leopard").
   4984                 'variables': {
   4985                   # Define change_mach_o_flags in a variable ending in _path
   4986                   # so that GYP understands it's a path and performs proper
   4987                   # relativization during dict merging.
   4988                   'change_mach_o_flags_path':
   4989                       'mac/change_mach_o_flags_from_xcode.sh',
   4990                   'change_mach_o_flags_options%': [
   4991                   ],
   4992                   'target_conditions': [
   4993                     ['mac_pie==0 or release_valgrind_build==1', {
   4994                       # Don't enable PIE if it's unwanted. It's unwanted if
   4995                       # the target specifies mac_pie=0 or if building for
   4996                       # Valgrind, because Valgrind doesn't understand slide.
   4997                       # See the similar mac_pie/release_valgrind_build check
   4998                       # below.
   4999                       'change_mach_o_flags_options': [
   5000                         '--no-pie',
   5001                       ],
   5002                     }],
   5003                   ],
   5004                 },
   5005                 'postbuild_name': 'Change Mach-O Flags',
   5006                 'action': [
   5007                   '<(change_mach_o_flags_path)',
   5008                   '>@(change_mach_o_flags_options)',
   5009                 ],
   5010               },
   5011             ],
   5012             'conditions': [
   5013               ['asan==1', {
   5014                 'variables': {
   5015                  'asan_saves_file': 'asan.saves',
   5016                 },
   5017                 'xcode_settings': {
   5018                   'CHROMIUM_STRIP_SAVE_FILE': '<(asan_saves_file)',
   5019                 },
   5020               }],
   5021             ],
   5022             'target_conditions': [
   5023               ['mac_pie==1 and release_valgrind_build==0', {
   5024                 # Turn on position-independence (ASLR) for executables. When
   5025                 # PIE is on for the Chrome executables, the framework will
   5026                 # also be subject to ASLR.
   5027                 # Don't do this when building for Valgrind, because Valgrind
   5028                 # doesn't understand slide. TODO: Make Valgrind on Mac OS X
   5029                 # understand slide, and get rid of the Valgrind check.
   5030                 'xcode_settings': {
   5031                   'OTHER_LDFLAGS': [
   5032                     '-Wl,-pie',  # Position-independent executable (MH_PIE)
   5033                   ],
   5034                 },
   5035               }],
   5036             ],
   5037           }],
   5038           ['(_type=="executable" or _type=="shared_library" or \
   5039              _type=="loadable_module") and mac_strip!=0', {
   5040             'target_conditions': [
   5041               ['mac_real_dsym == 1', {
   5042                 # To get a real .dSYM bundle produced by dsymutil, set the
   5043                 # debug information format to dwarf-with-dsym.  Since
   5044                 # strip_from_xcode will not be used, set Xcode to do the
   5045                 # stripping as well.
   5046                 'configurations': {
   5047                   'Release_Base': {
   5048                     'xcode_settings': {
   5049                       'DEBUG_INFORMATION_FORMAT': 'dwarf-with-dsym',
   5050                       'DEPLOYMENT_POSTPROCESSING': 'YES',
   5051                       'STRIP_INSTALLED_PRODUCT': 'YES',
   5052                       'target_conditions': [
   5053                         ['_type=="shared_library" or _type=="loadable_module"', {
   5054                           # The Xcode default is to strip debugging symbols
   5055                           # only (-S).  Local symbols should be stripped as
   5056                           # well, which will be handled by -x.  Xcode will
   5057                           # continue to insert -S when stripping even when
   5058                           # additional flags are added with STRIPFLAGS.
   5059                           'STRIPFLAGS': '-x',
   5060                         }],  # _type=="shared_library" or _type=="loadable_module"
   5061                         ['_type=="executable"', {
   5062                           'conditions': [
   5063                             ['asan==1', {
   5064                               'STRIPFLAGS': '-s $(CHROMIUM_STRIP_SAVE_FILE)',
   5065                             }]
   5066                           ],
   5067                         }],  # _type=="executable" and asan==1
   5068                       ],  # target_conditions
   5069                     },  # xcode_settings
   5070                   },  # configuration "Release"
   5071                 },  # configurations
   5072               }, {  # mac_real_dsym != 1
   5073                 # To get a fast fake .dSYM bundle, use a post-build step to
   5074                 # produce the .dSYM and strip the executable.  strip_from_xcode
   5075                 # only operates in the Release configuration.
   5076                 'postbuilds': [
   5077                   {
   5078                     'variables': {
   5079                       # Define strip_from_xcode in a variable ending in _path
   5080                       # so that gyp understands it's a path and performs proper
   5081                       # relativization during dict merging.
   5082                       'strip_from_xcode_path': 'mac/strip_from_xcode',
   5083                     },
   5084                     'postbuild_name': 'Strip If Needed',
   5085                     'action': ['<(strip_from_xcode_path)'],
   5086                   },
   5087                 ],  # postbuilds
   5088               }],  # mac_real_dsym
   5089             ],  # target_conditions
   5090           }],  # (_type=="executable" or _type=="shared_library" or
   5091                #  _type=="loadable_module") and mac_strip!=0
   5092         ],  # target_conditions
   5093       },  # target_defaults
   5094     }],  # OS=="mac"
   5095     ['OS=="ios"', {
   5096       'target_defaults': {
   5097         'xcode_settings' : {
   5098           # TODO(stuartmorgan): switch to c++0x (see TODOs in the clang
   5099           # section above).
   5100           'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++0x',
   5101 
   5102           'conditions': [
   5103             # Older Xcodes do not support -Wno-deprecated-register, so pass an
   5104             # additional flag to suppress the "unknown compiler option" error.
   5105             # Restrict this flag to builds that are either compiling with Xcode
   5106             # or compiling with Xcode's Clang.  This will allow Ninja builds to
   5107             # continue failing on unknown compiler options.
   5108             # TODO(rohitrao): This flag is temporary and should be removed as
   5109             # soon as the iOS bots are updated to use Xcode 5.1.
   5110             ['clang_xcode==1', {
   5111               'WARNING_CFLAGS': [
   5112                 '-Wno-unknown-warning-option',
   5113               ],
   5114             }],
   5115 
   5116             # Limit the valid architectures depending on "target_subarch".
   5117             # This need to include the "arm" architectures but also the "x86"
   5118             # ones (they are used when building for the simulator).
   5119             ['target_subarch=="arm32"', {
   5120               'VALID_ARCHS': ['armv7', 'i386'],
   5121             }],
   5122             ['target_subarch=="arm64"', {
   5123               'VALID_ARCHS': ['arm64', 'x86_64'],
   5124             }],
   5125             ['target_subarch=="both"', {
   5126               'VALID_ARCHS': ['arm64', 'armv7', 'x86_64', 'i386'],
   5127             }],
   5128             ['use_system_libcxx==1', {
   5129               'target_conditions': [
   5130                 # Only use libc++ when building target for iOS not when building
   5131                 # tools for the host (OS X) as Mac targets OS X SDK 10.6 which
   5132                 # does not support libc++.
   5133                 ['_toolset=="target"', {
   5134                   'CLANG_CXX_LIBRARY': 'libc++',  # -stdlib=libc++
   5135                 }]
   5136               ],
   5137             }, {
   5138               # The default for deployment target of 7.0+ is libc++, so force
   5139               # the old behavior unless libc++ is enabled.
   5140               'CLANG_CXX_LIBRARY': 'libstdc++',  # -stdlib=libstdc++
   5141             }],
   5142           ],
   5143         },
   5144         'target_conditions': [
   5145           ['_toolset=="host"', {
   5146             'xcode_settings': {
   5147               'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot
   5148               'MACOSX_DEPLOYMENT_TARGET': '<(mac_deployment_target)',
   5149               'VALID_ARCHS': [
   5150                 'x86_64',
   5151               ],
   5152               'ARCHS': [
   5153                 'x86_64',
   5154               ],
   5155             },
   5156           }],
   5157           ['_toolset=="target"', {
   5158             'xcode_settings': {
   5159               # This section should be for overriding host settings. But,
   5160               # since we can't negate the iphone deployment target above, we
   5161               # instead set it here for target only.
   5162               'IPHONEOS_DEPLOYMENT_TARGET': '<(ios_deployment_target)',
   5163               'ARCHS': ['$(ARCHS_STANDARD_INCLUDING_64_BIT)'],
   5164             },
   5165           }],
   5166           ['_type=="executable"', {
   5167             'configurations': {
   5168               'Release_Base': {
   5169                 'xcode_settings': {
   5170                   'DEPLOYMENT_POSTPROCESSING': 'YES',
   5171                   'STRIP_INSTALLED_PRODUCT': 'YES',
   5172                 },
   5173               },
   5174               'Debug_Base': {
   5175                 'xcode_settings': {
   5176                   # Remove dSYM to reduce build time.
   5177                   'DEBUG_INFORMATION_FORMAT': 'dwarf',
   5178                 },
   5179               },
   5180             },
   5181             'xcode_settings': {
   5182               'conditions': [
   5183                 ['chromium_ios_signing', {
   5184                   # iOS SDK wants everything for device signed.
   5185                   'CODE_SIGN_IDENTITY[sdk=iphoneos*]': 'iPhone Developer',
   5186                 }, {
   5187                   'CODE_SIGNING_REQUIRED': 'NO',
   5188                   'CODE_SIGN_IDENTITY[sdk=iphoneos*]': '',
   5189                 }],
   5190               ],
   5191             },
   5192           }],
   5193         ],  # target_conditions
   5194       },  # target_defaults
   5195     }],  # OS=="ios"
   5196     ['OS=="win"', {
   5197       'target_defaults': {
   5198         'defines': [
   5199           '_WIN32_WINNT=0x0602',
   5200           'WINVER=0x0602',
   5201           'WIN32',
   5202           '_WINDOWS',
   5203           'NOMINMAX',
   5204           'PSAPI_VERSION=1',
   5205           '_CRT_RAND_S',
   5206           'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
   5207           'WIN32_LEAN_AND_MEAN',
   5208           '_ATL_NO_OPENGL',
   5209           # _HAS_EXCEPTIONS must match ExceptionHandling in msvs_settings.
   5210           '_HAS_EXCEPTIONS=0',
   5211         ],
   5212         'conditions': [
   5213           ['buildtype=="Official"', {
   5214               # In official builds, targets can self-select an optimization
   5215               # level by defining a variable named 'optimize', and setting it
   5216               # to one of
   5217               # - "size", optimizes for minimal code size - the default.
   5218               # - "speed", optimizes for speed over code size.
   5219               # - "max", whole program optimization and link-time code
   5220               #   generation. This is very expensive and should be used
   5221               #   sparingly.
   5222               'variables': {
   5223                 'optimize%': 'size',
   5224               },
   5225               'msvs_settings': {
   5226                 'VCLinkerTool': {
   5227                   # Set /LTCG for the official builds.
   5228                   'LinkTimeCodeGeneration': '1',
   5229                 },
   5230               },
   5231               'target_conditions': [
   5232                 ['optimize=="size"', {
   5233                     'msvs_settings': {
   5234                       'VCCLCompilerTool': {
   5235                         # 1, optimizeMinSpace, Minimize Size (/O1)
   5236                         'Optimization': '1',
   5237                         # 2, favorSize - Favor small code (/Os)
   5238                         'FavorSizeOrSpeed': '2',
   5239                       },
   5240                     },
   5241                   },
   5242                 ],
   5243                 ['optimize=="speed"', {
   5244                     'msvs_settings': {
   5245                       'VCCLCompilerTool': {
   5246                         # 2, optimizeMaxSpeed, Maximize Speed (/O2)
   5247                         'Optimization': '2',
   5248                         # 1, favorSpeed - Favor fast code (/Ot)
   5249                         'FavorSizeOrSpeed': '1',
   5250                       },
   5251                     },
   5252                   },
   5253                 ],
   5254                 ['optimize=="max"', {
   5255                     # Disable Warning 4702 ("Unreachable code") for the WPO/PGO
   5256                     # builds. Probably anything that this would catch that
   5257                     # wouldn't be caught in a normal build isn't going to
   5258                     # actually be a bug, so the incremental value of C4702 for
   5259                     # PGO builds is likely very small.
   5260                     'msvs_disabled_warnings': [
   5261                       4702
   5262                     ],
   5263                     'msvs_settings': {
   5264                       'VCCLCompilerTool': {
   5265                         # 2, optimizeMaxSpeed, Maximize Speed (/O2)
   5266                         'Optimization': '2',
   5267                         # 1, favorSpeed - Favor fast code (/Ot)
   5268                         'FavorSizeOrSpeed': '1',
   5269                         # This implies link time code generation.
   5270                         'WholeProgramOptimization': 'true',
   5271                       },
   5272                     },
   5273                   },
   5274                 ],
   5275               ],
   5276             },
   5277           ],
   5278           ['secure_atl', {
   5279             'defines': [
   5280               '_SECURE_ATL',
   5281             ],
   5282           }],
   5283           ['msvs_express', {
   5284             'configurations': {
   5285               'x86_Base': {
   5286                 'msvs_settings': {
   5287                   'VCLinkerTool': {
   5288                     'AdditionalLibraryDirectories':
   5289                       ['<(windows_driver_kit_path)/lib/ATL/i386'],
   5290                   },
   5291                   'VCLibrarianTool': {
   5292                     'AdditionalLibraryDirectories':
   5293                       ['<(windows_driver_kit_path)/lib/ATL/i386'],
   5294                   },
   5295                 },
   5296               },
   5297               'x64_Base': {
   5298                 'msvs_settings': {
   5299                   'VCLibrarianTool': {
   5300                     'AdditionalLibraryDirectories':
   5301                       ['<(windows_driver_kit_path)/lib/ATL/amd64'],
   5302                   },
   5303                   'VCLinkerTool': {
   5304                     'AdditionalLibraryDirectories':
   5305                       ['<(windows_driver_kit_path)/lib/ATL/amd64'],
   5306                   },
   5307                 },
   5308               },
   5309             },
   5310             # https://code.google.com/p/chromium/issues/detail?id=372451#c20
   5311             # Warning 4702 ("Unreachable code") should be re-enabled once
   5312             # Express users are updated to VS2013 Update 2.
   5313             'msvs_disabled_warnings': [
   5314               4702
   5315             ],
   5316             'msvs_settings': {
   5317               'VCCLCompilerTool': {
   5318                 'AdditionalOptions!': [
   5319                     '/Zc:inline',  # Not supported on non-updated Express.
   5320                 ],
   5321               },
   5322               'VCLinkerTool': {
   5323                 # Explicitly required when using the ATL with express
   5324                 'AdditionalDependencies': ['atlthunk.lib'],
   5325 
   5326                 # ATL 8.0 included in WDK 7.1 makes the linker to generate
   5327                 # almost eight hundred LNK4254 and LNK4078 warnings:
   5328                 #   - warning LNK4254: section 'ATL' (50000040) merged into
   5329                 #     '.rdata' (40000040) with different attributes
   5330                 #   - warning LNK4078: multiple 'ATL' sections found with
   5331                 #     different attributes
   5332                 'AdditionalOptions': ['/ignore:4254', '/ignore:4078'],
   5333               },
   5334             },
   5335             'msvs_system_include_dirs': [
   5336               '<(windows_driver_kit_path)/inc/atl71',
   5337               '<(windows_driver_kit_path)/inc/mfc42',
   5338             ],
   5339           }],
   5340         ],
   5341         'msvs_system_include_dirs': [
   5342           '<(windows_sdk_path)/Include/shared',
   5343           '<(windows_sdk_path)/Include/um',
   5344           '<(windows_sdk_path)/Include/winrt',
   5345           '$(VSInstallDir)/VC/atlmfc/include',
   5346         ],
   5347         'msvs_cygwin_shell': 0,
   5348         'msvs_disabled_warnings': [
   5349           # C4127: conditional expression is constant
   5350           # This warning can in theory catch dead code and other problems, but
   5351           # triggers in far too many desirable cases where the conditional
   5352           # expression is either set by macros or corresponds some legitimate
   5353           # compile-time constant expression (due to constant template args,
   5354           # conditionals comparing the sizes of different types, etc.).  Some of
   5355           # these can be worked around, but it's not worth it.
   5356           4127,
   5357 
   5358           # C4351: new behavior: elements of array 'array' will be default
   5359           #        initialized
   5360           # This is a silly "warning" that basically just alerts you that the
   5361           # compiler is going to actually follow the language spec like it's
   5362           # supposed to, instead of not following it like old buggy versions
   5363           # did.  There's absolutely no reason to turn this on.
   5364           4351,
   5365 
   5366           # C4355: 'this': used in base member initializer list
   5367           # It's commonly useful to pass |this| to objects in a class'
   5368           # initializer list.  While this warning can catch real bugs, most of
   5369           # the time the constructors in question don't attempt to call methods
   5370           # on the passed-in pointer (until later), and annotating every legit
   5371           # usage of this is simply more hassle than the warning is worth.
   5372           4355,
   5373 
   5374           # C4503: 'identifier': decorated name length exceeded, name was
   5375           #        truncated
   5376           # This only means that some long error messages might have truncated
   5377           # identifiers in the presence of lots of templates.  It has no effect
   5378           # on program correctness and there's no real reason to waste time
   5379           # trying to prevent it.
   5380           4503,
   5381 
   5382           # C4611: interaction between 'function' and C++ object destruction is
   5383           #        non-portable
   5384           # This warning is unavoidable when using e.g. setjmp/longjmp.  MSDN
   5385           # suggests using exceptions instead of setjmp/longjmp for C++, but
   5386           # Chromium code compiles without exception support.  We therefore have
   5387           # to use setjmp/longjmp for e.g. JPEG decode error handling, which
   5388           # means we have to turn off this warning (and be careful about how
   5389           # object destruction happens in such cases).
   5390           4611,
   5391 
   5392           # TODO(maruel): These warnings are level 4. They will be slowly
   5393           # removed as code is fixed.
   5394           4100, # Unreferenced formal parameter
   5395           4121, # Alignment of a member was sensitive to packing
   5396           4189, # Local variable is initialized but not referenced
   5397           4244, # Conversion from 'type1' to 'type2', possible loss of data
   5398           4481, # Nonstandard extension used: override specifier 'keyword'
   5399           4505, # Unreferenced local function has been removed
   5400           4510, # Default constructor could not be generated
   5401           4512, # Assignment operator could not be generated
   5402           4610, # Object can never be instantiated
   5403         ],
   5404         'msvs_settings': {
   5405           'VCCLCompilerTool': {
   5406             'AdditionalOptions': ['/MP'],
   5407             'MinimalRebuild': 'false',
   5408             'BufferSecurityCheck': 'true',
   5409             'EnableFunctionLevelLinking': 'true',
   5410             'RuntimeTypeInfo': 'false',
   5411             'WarningLevel': '4',
   5412             'WarnAsError': 'true',
   5413             'DebugInformationFormat': '3',
   5414             # ExceptionHandling must match _HAS_EXCEPTIONS above.
   5415             'ExceptionHandling': '0',
   5416           },
   5417           'VCLibrarianTool': {
   5418             'AdditionalOptions': ['/ignore:4221'],
   5419             'AdditionalLibraryDirectories': [
   5420               '<(windows_sdk_path)/Lib/win8/um/x86',
   5421             ],
   5422           },
   5423           'VCLinkerTool': {
   5424             'AdditionalDependencies': [
   5425               'wininet.lib',
   5426               'dnsapi.lib',
   5427               'version.lib',
   5428               'msimg32.lib',
   5429               'ws2_32.lib',
   5430               'usp10.lib',
   5431               'psapi.lib',
   5432               'dbghelp.lib',
   5433               'winmm.lib',
   5434               'shlwapi.lib',
   5435             ],
   5436             'AdditionalLibraryDirectories': [
   5437               '<(windows_sdk_path)/Lib/win8/um/x86',
   5438             ],
   5439             'GenerateDebugInformation': 'true',
   5440             'MapFileName': '$(OutDir)\\$(TargetName).map',
   5441             'ImportLibrary': '$(OutDir)\\lib\\$(TargetName).lib',
   5442             'FixedBaseAddress': '1',
   5443             # SubSystem values:
   5444             #   0 == not set
   5445             #   1 == /SUBSYSTEM:CONSOLE
   5446             #   2 == /SUBSYSTEM:WINDOWS
   5447             # Most of the executables we'll ever create are tests
   5448             # and utilities with console output.
   5449             'SubSystem': '1',
   5450           },
   5451           'VCMIDLTool': {
   5452             'GenerateStublessProxies': 'true',
   5453             'TypeLibraryName': '$(InputName).tlb',
   5454             'OutputDirectory': '$(IntDir)',
   5455             'HeaderFileName': '$(InputName).h',
   5456             'DLLDataFileName': '$(InputName).dlldata.c',
   5457             'InterfaceIdentifierFileName': '$(InputName)_i.c',
   5458             'ProxyFileName': '$(InputName)_p.c',
   5459           },
   5460           'VCResourceCompilerTool': {
   5461             'Culture' : '1033',
   5462             'AdditionalIncludeDirectories': [
   5463               '<(DEPTH)',
   5464               '<(SHARED_INTERMEDIATE_DIR)',
   5465             ],
   5466           },
   5467           'target_conditions': [
   5468             ['_type=="executable"', {
   5469               'VCManifestTool': {
   5470                 'EmbedManifest': 'true',
   5471               },
   5472             }],
   5473             ['_type=="executable" and ">(win_exe_compatibility_manifest)"!=""', {
   5474               'VCManifestTool': {
   5475                 'AdditionalManifestFiles': [
   5476                   '>(win_exe_compatibility_manifest)',
   5477                 ],
   5478               },
   5479             }],
   5480           ],
   5481           'conditions': [
   5482             ['clang==1', {
   5483               # Building with Clang on Windows is a work in progress and very
   5484               # experimental. See crbug.com/82385.
   5485               'VCCLCompilerTool': {
   5486                 'WarnAsError': 'false',
   5487                 'RuntimeTypeInfo': 'false',
   5488                 'AdditionalOptions': [
   5489                   '-fmsc-version=1800',
   5490                   '/fallback',
   5491 
   5492                   # Many files use intrinsics without including this header.
   5493                   # TODO(hans): Fix those files, or move this to sub-GYPs.
   5494                   '/FIIntrin.h',
   5495 
   5496                   # TODO(hans): Make this list shorter eventually.
   5497                   '-Qunused-arguments',
   5498                   '-Wno-c++11-compat-deprecated-writable-strings',
   5499                   '-Wno-deprecated-declarations',
   5500                   '-Wno-empty-body',
   5501                   '-Wno-enum-conversion',
   5502                   '-Wno-extra-tokens',
   5503                   '-Wno-ignored-attributes',
   5504                   '-Wno-incompatible-pointer-types',
   5505                   '-Wno-int-to-void-pointer-cast',
   5506                   '-Wno-invalid-noreturn',
   5507                   '-Wno-logical-op-parentheses',
   5508                   '-Wno-microsoft',
   5509                   '-Wno-missing-braces',
   5510                   '-Wno-missing-declarations',
   5511                   '-Wno-msvc-include',
   5512                   '-Wno-null-dereference',
   5513                   '-Wno-overloaded-virtual',
   5514                   '-Wno-parentheses',
   5515                   '-Wno-pointer-sign',
   5516                   '-Wno-reorder',
   5517                   '-Wno-return-type-c-linkage',
   5518                   '-Wno-self-assign',
   5519                   '-Wno-sometimes-uninitialized',
   5520                   '-Wno-switch',
   5521                   '-Wno-tautological-compare',
   5522                   '-Wno-unknown-pragmas',
   5523                   '-Wno-unsequenced',
   5524                   '-Wno-unused-function',
   5525                   '-Wno-unused-private-field',
   5526                   '-Wno-unused-value',
   5527                   '-Wno-unused-variable',
   5528                   '-Wno-unused-local-typedef',  # http://crbug.com/411648
   5529                 ],
   5530               },
   5531             }],
   5532             ['asan==1', {
   5533               # ASan on Windows is a work in progress and very experimental.
   5534               # See crbug.com/345874.
   5535               'VCCLCompilerTool': {
   5536                 'AdditionalOptions': [
   5537                   '-fsanitize=address',
   5538                 ],
   5539                 'AdditionalIncludeDirectories': [
   5540                   # MSVC needs to be able to find the sanitizer headers when
   5541                   # invoked via /fallback. This is critical for using macros
   5542                   # like ASAN_UNPOISON_MEMORY_REGION in files where we fall
   5543                   # back.
   5544                   '<(DEPTH)/<(make_clang_dir)/lib/clang/3.6.0/include_sanitizer',
   5545                 ],
   5546               },
   5547               'VCLinkerTool': {
   5548                 'AdditionalLibraryDirectories': [
   5549                   # TODO(hans): If make_clang_dir is absolute, this breaks.
   5550                   '<(DEPTH)/<(make_clang_dir)/lib/clang/3.6.0/lib/windows',
   5551                 ],
   5552               },
   5553               'target_conditions': [
   5554                 ['component=="shared_library"', {
   5555                   'VCLinkerTool': {
   5556                     'AdditionalDependencies': [
   5557                        'clang_rt.asan_dynamic-i386.lib',
   5558                        'clang_rt.asan_dynamic_runtime_thunk-i386.lib',
   5559                     ],
   5560                   },
   5561                 }],
   5562                 ['_type=="executable" and component=="static_library"', {
   5563                   'VCLinkerTool': {
   5564                     'AdditionalDependencies': [
   5565                        'clang_rt.asan-i386.lib',
   5566                     ],
   5567                   },
   5568                 }],
   5569                 ['(_type=="shared_library" or _type=="loadable_module") and component=="static_library"', {
   5570                   'VCLinkerTool': {
   5571                     'AdditionalDependencies': [
   5572                        'clang_rt.asan_dll_thunk-i386.lib',
   5573                     ],
   5574                   },
   5575                 }],
   5576               ],
   5577             }],
   5578           ],
   5579         },
   5580       },
   5581     }],
   5582     ['disable_nacl==1', {
   5583       'target_defaults': {
   5584         'defines': [
   5585           'DISABLE_NACL',
   5586         ],
   5587       },
   5588     }],
   5589     ['OS=="win" and msvs_use_common_linker_extras', {
   5590       'target_defaults': {
   5591         'msvs_settings': {
   5592           'VCLinkerTool': {
   5593             'DelayLoadDLLs': [
   5594               'dbghelp.dll',
   5595               'dwmapi.dll',
   5596               'shell32.dll',
   5597               'uxtheme.dll',
   5598             ],
   5599           },
   5600         },
   5601         'configurations': {
   5602           'x86_Base': {
   5603             'msvs_settings': {
   5604               'VCLinkerTool': {
   5605                 'AdditionalOptions': [
   5606                   '/safeseh',
   5607                   '/dynamicbase',
   5608                   '/ignore:4199',
   5609                   '/ignore:4221',
   5610                   '/nxcompat',
   5611                 ],
   5612                 'conditions': [
   5613                   ['syzyasan==0', {
   5614                     'AdditionalOptions': ['/largeaddressaware'],
   5615                   }],
   5616                 ],
   5617               },
   5618             },
   5619           },
   5620           'x64_Base': {
   5621             'msvs_settings': {
   5622               'VCLinkerTool': {
   5623                 'AdditionalOptions': [
   5624                   # safeseh is not compatible with x64
   5625                   '/dynamicbase',
   5626                   '/ignore:4199',
   5627                   '/ignore:4221',
   5628                   '/nxcompat',
   5629                 ],
   5630               },
   5631             },
   5632           },
   5633         },
   5634       },
   5635     }],
   5636     ['enable_new_npdevice_api==1', {
   5637       'target_defaults': {
   5638         'defines': [
   5639           'ENABLE_NEW_NPDEVICE_API',
   5640         ],
   5641       },
   5642     }],
   5643     # Don't warn about the "typedef 'foo' locally defined but not used"
   5644     # for gcc 4.8 and higher.
   5645     # TODO: remove this flag once all builds work. See crbug.com/227506
   5646     ['gcc_version>=48 and clang==0', {
   5647       'target_defaults': {
   5648         'cflags': [
   5649           '-Wno-unused-local-typedefs',
   5650         ],
   5651       },
   5652     }],
   5653     ['gcc_version>=48 and clang==0 and host_clang==1', {
   5654       'target_defaults': {
   5655         'target_conditions': [
   5656           ['_toolset=="host"', { 'cflags!': [ '-Wno-unused-local-typedefs' ]}],
   5657         ],
   5658       },
   5659     }],
   5660     # In the android webview build, force host targets to be compiled with clang
   5661     # as the hermetic host gcc is very old on some platforms. This is already
   5662     # the default on the current development version of AOSP but we force it
   5663     # here in case we need to compile against an older release version.
   5664     ['android_webview_build==1', {
   5665       'target_defaults': {
   5666         'target_conditions': [
   5667           ['_toolset=="host"', {
   5668             'aosp_build_settings': {
   5669               'LOCAL_CLANG': 'true',
   5670             },
   5671           }],
   5672         ],
   5673       },
   5674     }],
   5675     # We need a special case to handle the android webview build on mac because
   5676     # the host gcc there doesn't accept this flag, but the target gcc may
   5677     # require it.
   5678     ['gcc_version>=48 and android_webview_build==1 and host_os=="mac"', {
   5679       'target_defaults': {
   5680         'target_conditions': [
   5681           ['_toolset=="host"', {
   5682             'cflags!': [
   5683               '-Wno-unused-local-typedefs',
   5684             ],
   5685           }],
   5686         ],
   5687       },
   5688     }],
   5689     ['clang==1 and ((OS!="mac" and OS!="ios") or clang_xcode==0) '
   5690         'and OS!="win"', {
   5691       'make_global_settings': [
   5692         ['CC', '<(make_clang_dir)/bin/clang'],
   5693         ['CXX', '<(make_clang_dir)/bin/clang++'],
   5694         ['CC.host', '$(CC)'],
   5695         ['CXX.host', '$(CXX)'],
   5696       ],
   5697     }],
   5698     ['clang==1 and OS=="win"', {
   5699       'make_global_settings': [
   5700         # On Windows, gyp's ninja generator only looks at CC.
   5701         ['CC', '<(make_clang_dir)/bin/clang-cl'],
   5702       ],
   5703     }],
   5704     ['OS=="android" and clang==0', {
   5705       # Hardcode the compiler names in the Makefile so that
   5706       # it won't depend on the environment at make time.
   5707       'make_global_settings': [
   5708         ['CC', '<!(/bin/echo -n <(android_toolchain)/*-gcc)'],
   5709         ['CXX', '<!(/bin/echo -n <(android_toolchain)/*-g++)'],
   5710         ['CC.host', '<(host_cc)'],
   5711         ['CXX.host', '<(host_cxx)'],
   5712       ],
   5713     }],
   5714     ['OS=="linux" and target_arch=="mipsel"', {
   5715       'make_global_settings': [
   5716         ['CC', '<(sysroot)/../bin/mipsel-linux-gnu-gcc'],
   5717         ['CXX', '<(sysroot)/../bin/mipsel-linux-gnu-g++'],
   5718         ['CC.host', '<(host_cc)'],
   5719         ['CXX.host', '<(host_cxx)'],
   5720       ],
   5721     }],
   5722     ['OS=="linux" and target_arch=="arm" and host_arch!="arm" and chromeos==0 and clang==0', {
   5723       # Set default ARM cross compiling on linux.  These can be overridden
   5724       # using CC/CXX/etc environment variables.
   5725       'make_global_settings': [
   5726         ['CC', '<!(which arm-linux-gnueabihf-gcc)'],
   5727         ['CXX', '<!(which arm-linux-gnueabihf-g++)'],
   5728         ['CC.host', '<(host_cc)'],
   5729         ['CXX.host', '<(host_cxx)'],
   5730       ],
   5731     }],
   5732 
   5733     # TODO(yyanagisawa): supports GENERATOR==make
   5734     #  make generator doesn't support CC_wrapper without CC
   5735     #  in make_global_settings yet.
   5736     ['use_goma==1 and ("<(GENERATOR)"=="ninja" or clang==1)', {
   5737       'make_global_settings': [
   5738        ['CC_wrapper', '<(gomadir)/gomacc'],
   5739        ['CXX_wrapper', '<(gomadir)/gomacc'],
   5740        ['CC.host_wrapper', '<(gomadir)/gomacc'],
   5741        ['CXX.host_wrapper', '<(gomadir)/gomacc'],
   5742       ],
   5743     }],
   5744   ],
   5745   'xcode_settings': {
   5746     # DON'T ADD ANYTHING NEW TO THIS BLOCK UNLESS YOU REALLY REALLY NEED IT!
   5747     # This block adds *project-wide* configuration settings to each project
   5748     # file.  It's almost always wrong to put things here.  Specify your
   5749     # custom xcode_settings in target_defaults to add them to targets instead.
   5750 
   5751     'conditions': [
   5752       # In an Xcode Project Info window, the "Base SDK for All Configurations"
   5753       # setting sets the SDK on a project-wide basis. In order to get the
   5754       # configured SDK to show properly in the Xcode UI, SDKROOT must be set
   5755       # here at the project level.
   5756       ['OS=="mac"', {
   5757         'conditions': [
   5758           ['mac_sdk_path==""', {
   5759             'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot
   5760           }, {
   5761             'SDKROOT': '<(mac_sdk_path)',  # -isysroot
   5762           }],
   5763         ],
   5764       }],
   5765       ['OS=="ios"', {
   5766         'conditions': [
   5767           ['ios_sdk_path==""', {
   5768             'conditions': [
   5769               # TODO(justincohen): Ninja only supports simulator for now.
   5770               ['"<(GENERATOR)"=="xcode"', {
   5771                 'SDKROOT': 'iphoneos<(ios_sdk)',  # -isysroot
   5772               }, {
   5773                 'SDKROOT': 'iphonesimulator<(ios_sdk)',  # -isysroot
   5774               }],
   5775             ],
   5776           }, {
   5777             'SDKROOT': '<(ios_sdk_path)',  # -isysroot
   5778           }],
   5779         ],
   5780       }],
   5781       ['OS=="ios"', {
   5782         # Target both iPhone and iPad.
   5783         'TARGETED_DEVICE_FAMILY': '1,2',
   5784       }, {  # OS!="ios"
   5785         'conditions': [
   5786           ['target_arch=="x64"', {
   5787             'ARCHS': [
   5788               'x86_64'
   5789             ],
   5790           }],
   5791           ['target_arch=="ia32"', {
   5792             'ARCHS': [
   5793               'i386'
   5794             ],
   5795           }],
   5796         ],
   5797       }],
   5798     ],
   5799 
   5800     # The Xcode generator will look for an xcode_settings section at the root
   5801     # of each dict and use it to apply settings on a file-wide basis.  Most
   5802     # settings should not be here, they should be in target-specific
   5803     # xcode_settings sections, or better yet, should use non-Xcode-specific
   5804     # settings in target dicts.  SYMROOT is a special case, because many other
   5805     # Xcode variables depend on it, including variables such as
   5806     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
   5807     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
   5808     # files to appear (when present) in the UI as actual files and not red
   5809     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
   5810     # and therefore SYMROOT, needs to be set at the project level.
   5811     'SYMROOT': '<(DEPTH)/xcodebuild',
   5812   },
   5813 }
   5814