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      1 // Copyright 2013 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 #include "content/child/runtime_features.h"
      6 
      7 #include "base/command_line.h"
      8 #include "content/common/content_switches_internal.h"
      9 #include "content/public/common/content_switches.h"
     10 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
     11 #include "ui/native_theme/native_theme_switches.h"
     12 
     13 #if defined(OS_ANDROID)
     14 #include <cpu-features.h>
     15 #include "base/android/build_info.h"
     16 #include "media/base/android/media_codec_bridge.h"
     17 #endif
     18 
     19 using blink::WebRuntimeFeatures;
     20 
     21 namespace content {
     22 
     23 static void SetRuntimeFeatureDefaultsForPlatform() {
     24 #if defined(OS_ANDROID)
     25   // MSE/EME implementation needs Android MediaCodec API.
     26   if (!media::MediaCodecBridge::IsAvailable()) {
     27     WebRuntimeFeatures::enableMediaSource(false);
     28     WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
     29     WebRuntimeFeatures::enableEncryptedMedia(false);
     30   }
     31   // WebAudio is enabled by default but only when the MediaCodec API
     32   // is available.
     33   AndroidCpuFamily cpu_family = android_getCpuFamily();
     34   WebRuntimeFeatures::enableWebAudio(
     35       media::MediaCodecBridge::IsAvailable() &&
     36       ((cpu_family == ANDROID_CPU_FAMILY_ARM) ||
     37        (cpu_family == ANDROID_CPU_FAMILY_ARM64) ||
     38        (cpu_family == ANDROID_CPU_FAMILY_X86) ||
     39        (cpu_family == ANDROID_CPU_FAMILY_MIPS)));
     40 
     41   // Android supports gamepad API for JellyBean and beyond
     42   WebRuntimeFeatures::enableGamepad(
     43       base::android::BuildInfo::GetInstance()->sdk_int() >= 16);
     44   // Android does not have support for PagePopup
     45   WebRuntimeFeatures::enablePagePopup(false);
     46   // Android does not yet support the Web Notification API. crbug.com/115320
     47   WebRuntimeFeatures::enableNotifications(false);
     48   // Android does not yet support SharedWorker. crbug.com/154571
     49   WebRuntimeFeatures::enableSharedWorker(false);
     50   // Android does not yet support NavigatorContentUtils.
     51   WebRuntimeFeatures::enableNavigatorContentUtils(false);
     52   WebRuntimeFeatures::enableTouchIconLoading(true);
     53   WebRuntimeFeatures::enableOrientationEvent(true);
     54   WebRuntimeFeatures::enableFastMobileScrolling(true);
     55 #else
     56   WebRuntimeFeatures::enableNavigatorContentUtils(true);
     57 #endif  // defined(OS_ANDROID)
     58 }
     59 
     60 void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
     61     const CommandLine& command_line) {
     62   if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
     63     WebRuntimeFeatures::enableExperimentalFeatures(true);
     64 
     65   SetRuntimeFeatureDefaultsForPlatform();
     66 
     67   if (command_line.HasSwitch(switches::kDisableDatabases))
     68     WebRuntimeFeatures::enableDatabase(false);
     69 
     70   if (command_line.HasSwitch(switches::kDisableApplicationCache))
     71     WebRuntimeFeatures::enableApplicationCache(false);
     72 
     73   if (command_line.HasSwitch(switches::kDisableDesktopNotifications))
     74     WebRuntimeFeatures::enableNotifications(false);
     75 
     76   if (command_line.HasSwitch(switches::kDisableNavigatorContentUtils))
     77     WebRuntimeFeatures::enableNavigatorContentUtils(false);
     78 
     79   if (command_line.HasSwitch(switches::kDisableLocalStorage))
     80     WebRuntimeFeatures::enableLocalStorage(false);
     81 
     82   if (command_line.HasSwitch(switches::kDisableSessionStorage))
     83     WebRuntimeFeatures::enableSessionStorage(false);
     84 
     85   if (command_line.HasSwitch(switches::kDisableMediaSource))
     86     WebRuntimeFeatures::enableMediaSource(false);
     87 
     88   if (command_line.HasSwitch(switches::kDisableSharedWorkers))
     89     WebRuntimeFeatures::enableSharedWorker(false);
     90 
     91 #if defined(OS_ANDROID)
     92   if (command_line.HasSwitch(switches::kDisableWebRTC)) {
     93     WebRuntimeFeatures::enableMediaStream(false);
     94     WebRuntimeFeatures::enablePeerConnection(false);
     95   }
     96 
     97   if (!command_line.HasSwitch(switches::kEnableSpeechRecognition))
     98     WebRuntimeFeatures::enableScriptedSpeech(false);
     99 #endif
    100 
    101   if (command_line.HasSwitch(switches::kEnableServiceWorker))
    102     WebRuntimeFeatures::enableServiceWorker(true);
    103 
    104 #if defined(OS_ANDROID)
    105   // WebAudio is enabled by default on ARM and X86, if the MediaCodec
    106   // API is available.
    107   WebRuntimeFeatures::enableWebAudio(
    108       !command_line.HasSwitch(switches::kDisableWebAudio) &&
    109       media::MediaCodecBridge::IsAvailable());
    110 #else
    111   if (command_line.HasSwitch(switches::kDisableWebAudio))
    112     WebRuntimeFeatures::enableWebAudio(false);
    113 #endif
    114 
    115   if (command_line.HasSwitch(switches::kEnableEncryptedMedia))
    116     WebRuntimeFeatures::enableEncryptedMedia(true);
    117 
    118   if (command_line.HasSwitch(switches::kDisablePrefixedEncryptedMedia))
    119     WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
    120 
    121   if (command_line.HasSwitch(switches::kEnableWebAnimationsSVG))
    122     WebRuntimeFeatures::enableWebAnimationsSVG(true);
    123 
    124   if (command_line.HasSwitch(switches::kEnableWebMIDI))
    125     WebRuntimeFeatures::enableWebMIDI(true);
    126 
    127   if (command_line.HasSwitch(switches::kDisableFileSystem))
    128     WebRuntimeFeatures::enableFileSystem(false);
    129 
    130   if (command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures))
    131     WebRuntimeFeatures::enableExperimentalCanvasFeatures(true);
    132 
    133   if (command_line.HasSwitch(switches::kEnableSpeechSynthesis))
    134     WebRuntimeFeatures::enableSpeechSynthesis(true);
    135 
    136   if (command_line.HasSwitch(switches::kEnableWebGLDraftExtensions))
    137     WebRuntimeFeatures::enableWebGLDraftExtensions(true);
    138 
    139   if (command_line.HasSwitch(switches::kEnableWebGLImageChromium))
    140     WebRuntimeFeatures::enableWebGLImageChromium(true);
    141 
    142   if (command_line.HasSwitch(switches::kEnableOverlayFullscreenVideo))
    143     WebRuntimeFeatures::enableOverlayFullscreenVideo(true);
    144 
    145   if (ui::IsOverlayScrollbarEnabled())
    146     WebRuntimeFeatures::enableOverlayScrollbars(true);
    147 
    148   if (command_line.HasSwitch(switches::kEnableFastTextAutosizing))
    149     WebRuntimeFeatures::enableFastTextAutosizing(true);
    150 
    151   if (command_line.HasSwitch(switches::kDisableFastTextAutosizing))
    152     WebRuntimeFeatures::enableFastTextAutosizing(false);
    153 
    154   if (command_line.HasSwitch(switches::kDisableRepaintAfterLayout))
    155     WebRuntimeFeatures::enableRepaintAfterLayout(false);
    156 
    157   if (command_line.HasSwitch(switches::kEnableRepaintAfterLayout))
    158     WebRuntimeFeatures::enableRepaintAfterLayout(true);
    159 
    160   if (command_line.HasSwitch(switches::kEnableTargetedStyleRecalc))
    161     WebRuntimeFeatures::enableTargetedStyleRecalc(true);
    162 
    163   if (command_line.HasSwitch(switches::kEnableBleedingEdgeRenderingFastPaths))
    164     WebRuntimeFeatures::enableBleedingEdgeFastPaths(true);
    165 
    166   if (command_line.HasSwitch(switches::kEnablePreciseMemoryInfo))
    167     WebRuntimeFeatures::enablePreciseMemoryInfo(true);
    168 
    169   if (command_line.HasSwitch(switches::kEnableLayerSquashing))
    170     WebRuntimeFeatures::enableLayerSquashing(true);
    171 }
    172 
    173 }  // namespace content
    174