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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 #include "ppapi/proxy/interface_list.h"
      6 
      7 #include "base/hash.h"
      8 #include "base/lazy_instance.h"
      9 #include "base/memory/singleton.h"
     10 #include "ppapi/c/dev/ppb_audio_input_dev.h"
     11 #include "ppapi/c/dev/ppb_buffer_dev.h"
     12 #include "ppapi/c/dev/ppb_char_set_dev.h"
     13 #include "ppapi/c/dev/ppb_crypto_dev.h"
     14 #include "ppapi/c/dev/ppb_cursor_control_dev.h"
     15 #include "ppapi/c/dev/ppb_device_ref_dev.h"
     16 #include "ppapi/c/dev/ppb_font_dev.h"
     17 #include "ppapi/c/dev/ppb_gles_chromium_texture_mapping_dev.h"
     18 #include "ppapi/c/dev/ppb_ime_input_event_dev.h"
     19 #include "ppapi/c/dev/ppb_memory_dev.h"
     20 #include "ppapi/c/dev/ppb_messaging_deprecated.h"
     21 #include "ppapi/c/dev/ppb_opengles2ext_dev.h"
     22 #include "ppapi/c/dev/ppb_printing_dev.h"
     23 #include "ppapi/c/dev/ppb_scrollbar_dev.h"
     24 #include "ppapi/c/dev/ppb_text_input_dev.h"
     25 #include "ppapi/c/dev/ppb_trace_event_dev.h"
     26 #include "ppapi/c/dev/ppb_truetype_font_dev.h"
     27 #include "ppapi/c/dev/ppb_url_util_dev.h"
     28 #include "ppapi/c/dev/ppb_var_deprecated.h"
     29 #include "ppapi/c/dev/ppb_video_capture_dev.h"
     30 #include "ppapi/c/dev/ppb_view_dev.h"
     31 #include "ppapi/c/dev/ppb_widget_dev.h"
     32 #include "ppapi/c/dev/ppb_zoom_dev.h"
     33 #include "ppapi/c/ppb_audio.h"
     34 #include "ppapi/c/ppb_audio_buffer.h"
     35 #include "ppapi/c/ppb_audio_config.h"
     36 #include "ppapi/c/ppb_compositor.h"
     37 #include "ppapi/c/ppb_compositor_layer.h"
     38 #include "ppapi/c/ppb_console.h"
     39 #include "ppapi/c/ppb_core.h"
     40 #include "ppapi/c/ppb_file_io.h"
     41 #include "ppapi/c/ppb_file_mapping.h"
     42 #include "ppapi/c/ppb_file_ref.h"
     43 #include "ppapi/c/ppb_file_system.h"
     44 #include "ppapi/c/ppb_fullscreen.h"
     45 #include "ppapi/c/ppb_graphics_2d.h"
     46 #include "ppapi/c/ppb_host_resolver.h"
     47 #include "ppapi/c/ppb_image_data.h"
     48 #include "ppapi/c/ppb_input_event.h"
     49 #include "ppapi/c/ppb_instance.h"
     50 #include "ppapi/c/ppb_media_stream_audio_track.h"
     51 #include "ppapi/c/ppb_media_stream_video_track.h"
     52 #include "ppapi/c/ppb_message_loop.h"
     53 #include "ppapi/c/ppb_messaging.h"
     54 #include "ppapi/c/ppb_mouse_lock.h"
     55 #include "ppapi/c/ppb_net_address.h"
     56 #include "ppapi/c/ppb_network_list.h"
     57 #include "ppapi/c/ppb_network_monitor.h"
     58 #include "ppapi/c/ppb_network_proxy.h"
     59 #include "ppapi/c/ppb_opengles2.h"
     60 #include "ppapi/c/ppb_tcp_socket.h"
     61 #include "ppapi/c/ppb_text_input_controller.h"
     62 #include "ppapi/c/ppb_udp_socket.h"
     63 #include "ppapi/c/ppb_url_loader.h"
     64 #include "ppapi/c/ppb_url_request_info.h"
     65 #include "ppapi/c/ppb_url_response_info.h"
     66 #include "ppapi/c/ppb_var.h"
     67 #include "ppapi/c/ppb_var_array.h"
     68 #include "ppapi/c/ppb_var_array_buffer.h"
     69 #include "ppapi/c/ppb_var_dictionary.h"
     70 #include "ppapi/c/ppb_video_decoder.h"
     71 #include "ppapi/c/ppb_video_frame.h"
     72 #include "ppapi/c/ppb_view.h"
     73 #include "ppapi/c/pp_errors.h"
     74 #include "ppapi/c/ppp_instance.h"
     75 #include "ppapi/c/private/ppb_content_decryptor_private.h"
     76 #include "ppapi/c/private/ppb_ext_crx_file_system_private.h"
     77 #include "ppapi/c/private/ppb_file_io_private.h"
     78 #include "ppapi/c/private/ppb_file_ref_private.h"
     79 #include "ppapi/c/private/ppb_find_private.h"
     80 #include "ppapi/c/private/ppb_flash_clipboard.h"
     81 #include "ppapi/c/private/ppb_flash_file.h"
     82 #include "ppapi/c/private/ppb_flash_font_file.h"
     83 #include "ppapi/c/private/ppb_flash_fullscreen.h"
     84 #include "ppapi/c/private/ppb_flash.h"
     85 #include "ppapi/c/private/ppb_flash_device_id.h"
     86 #include "ppapi/c/private/ppb_flash_drm.h"
     87 #include "ppapi/c/private/ppb_flash_menu.h"
     88 #include "ppapi/c/private/ppb_flash_message_loop.h"
     89 #include "ppapi/c/private/ppb_flash_print.h"
     90 #include "ppapi/c/private/ppb_host_resolver_private.h"
     91 #include "ppapi/c/private/ppb_input_event_private.h"
     92 #include "ppapi/c/private/ppb_isolated_file_system_private.h"
     93 #include "ppapi/c/private/ppb_net_address_private.h"
     94 #include "ppapi/c/private/ppb_output_protection_private.h"
     95 #include "ppapi/c/private/ppb_pdf.h"
     96 #include "ppapi/c/private/ppb_platform_verification_private.h"
     97 #include "ppapi/c/private/ppb_talk_private.h"
     98 #include "ppapi/c/private/ppb_tcp_server_socket_private.h"
     99 #include "ppapi/c/private/ppb_tcp_socket_private.h"
    100 #include "ppapi/c/private/ppb_testing_private.h"
    101 #include "ppapi/c/private/ppb_udp_socket_private.h"
    102 #include "ppapi/c/private/ppb_uma_private.h"
    103 #include "ppapi/c/private/ppb_video_destination_private.h"
    104 #include "ppapi/c/private/ppb_video_source_private.h"
    105 #include "ppapi/c/private/ppb_x509_certificate_private.h"
    106 #include "ppapi/c/private/ppp_content_decryptor_private.h"
    107 #include "ppapi/c/trusted/ppb_broker_trusted.h"
    108 #include "ppapi/c/trusted/ppb_browser_font_trusted.h"
    109 #include "ppapi/c/trusted/ppb_char_set_trusted.h"
    110 #include "ppapi/c/trusted/ppb_file_chooser_trusted.h"
    111 #include "ppapi/c/trusted/ppb_url_loader_trusted.h"
    112 #include "ppapi/proxy/interface_proxy.h"
    113 #include "ppapi/proxy/plugin_globals.h"
    114 #include "ppapi/proxy/ppapi_messages.h"
    115 #include "ppapi/proxy/ppb_audio_proxy.h"
    116 #include "ppapi/proxy/ppb_broker_proxy.h"
    117 #include "ppapi/proxy/ppb_buffer_proxy.h"
    118 #include "ppapi/proxy/ppb_core_proxy.h"
    119 #include "ppapi/proxy/ppb_flash_message_loop_proxy.h"
    120 #include "ppapi/proxy/ppb_graphics_3d_proxy.h"
    121 #include "ppapi/proxy/ppb_image_data_proxy.h"
    122 #include "ppapi/proxy/ppb_instance_proxy.h"
    123 #include "ppapi/proxy/ppb_message_loop_proxy.h"
    124 #include "ppapi/proxy/ppb_testing_proxy.h"
    125 #include "ppapi/proxy/ppb_var_deprecated_proxy.h"
    126 #include "ppapi/proxy/ppb_video_decoder_proxy.h"
    127 #include "ppapi/proxy/ppb_x509_certificate_private_proxy.h"
    128 #include "ppapi/proxy/ppp_class_proxy.h"
    129 #include "ppapi/proxy/ppp_content_decryptor_private_proxy.h"
    130 #include "ppapi/proxy/ppp_find_proxy.h"
    131 #include "ppapi/proxy/ppp_graphics_3d_proxy.h"
    132 #include "ppapi/proxy/ppp_input_event_proxy.h"
    133 #include "ppapi/proxy/ppp_instance_private_proxy.h"
    134 #include "ppapi/proxy/ppp_instance_proxy.h"
    135 #include "ppapi/proxy/ppp_messaging_proxy.h"
    136 #include "ppapi/proxy/ppp_mouse_lock_proxy.h"
    137 #include "ppapi/proxy/ppp_pdf_proxy.h"
    138 #include "ppapi/proxy/ppp_printing_proxy.h"
    139 #include "ppapi/proxy/ppp_text_input_proxy.h"
    140 #include "ppapi/proxy/ppp_video_decoder_proxy.h"
    141 #include "ppapi/proxy/resource_creation_proxy.h"
    142 #include "ppapi/shared_impl/ppb_opengles2_shared.h"
    143 #include "ppapi/shared_impl/ppb_var_shared.h"
    144 #include "ppapi/thunk/thunk.h"
    145 
    146 // Helper to get the proxy name PPB_Foo_Proxy given the API name PPB_Foo.
    147 #define PROXY_CLASS_NAME(api_name) api_name##_Proxy
    148 
    149 // Helper to get the interface ID PPB_Foo_Proxy::kApiID given the API
    150 // name PPB_Foo.
    151 #define PROXY_API_ID(api_name) PROXY_CLASS_NAME(api_name)::kApiID
    152 
    153 // Helper to get the name of the templatized factory function.
    154 #define PROXY_FACTORY_NAME(api_name) ProxyFactory<PROXY_CLASS_NAME(api_name)>
    155 
    156 // Helper to get the name of the thunk GetPPB_Foo_1_0_Thunk given the interface
    157 // struct name PPB_Foo_1_0.
    158 #define INTERFACE_THUNK_NAME(iface_struct) thunk::Get##iface_struct##_Thunk
    159 
    160 namespace ppapi {
    161 namespace proxy {
    162 
    163 namespace {
    164 
    165 template<typename ProxyClass>
    166 InterfaceProxy* ProxyFactory(Dispatcher* dispatcher) {
    167   return new ProxyClass(dispatcher);
    168 }
    169 
    170 base::LazyInstance<PpapiPermissions> g_process_global_permissions;
    171 
    172 }  // namespace
    173 
    174 InterfaceList::InterfaceList() {
    175   memset(id_to_factory_, 0, sizeof(id_to_factory_));
    176 
    177   // Register the API factories for each of the API types. This calls AddProxy
    178   // for each InterfaceProxy type we support.
    179   #define PROXIED_API(api_name) \
    180       AddProxy(PROXY_API_ID(api_name), &PROXY_FACTORY_NAME(api_name));
    181 
    182   // Register each proxied interface by calling AddPPB for each supported
    183   // interface. Set current_required_permission to the appropriate value for
    184   // the value you want expanded by this macro.
    185   #define PROXIED_IFACE(iface_str, iface_struct) \
    186       AddPPB(iface_str, \
    187              INTERFACE_THUNK_NAME(iface_struct)(), \
    188              current_required_permission);
    189 
    190   {
    191     Permission current_required_permission = PERMISSION_NONE;
    192     #include "ppapi/thunk/interfaces_ppb_private_no_permissions.h"
    193     #include "ppapi/thunk/interfaces_ppb_public_stable.h"
    194   }
    195   {
    196     Permission current_required_permission = PERMISSION_DEV;
    197     #include "ppapi/thunk/interfaces_ppb_public_dev.h"
    198   }
    199   {
    200     Permission current_required_permission = PERMISSION_PRIVATE;
    201     #include "ppapi/thunk/interfaces_ppb_private.h"
    202   }
    203   {
    204 #if !defined(OS_NACL)
    205     Permission current_required_permission = PERMISSION_FLASH;
    206     #include "ppapi/thunk/interfaces_ppb_private_flash.h"
    207 #endif  // !defined(OS_NACL)
    208   }
    209   {
    210     Permission current_required_permission = PERMISSION_DEV_CHANNEL;
    211     #include "ppapi/thunk/interfaces_ppb_public_dev_channel.h"
    212   }
    213 
    214   #undef PROXIED_API
    215   #undef PROXIED_IFACE
    216 
    217   // Manually add some special proxies. Some of these don't have interfaces
    218   // that they support, so aren't covered by the macros above, but have proxies
    219   // for message routing. Others have different implementations between the
    220   // proxy and the impl and there's no obvious message routing.
    221   AddProxy(API_ID_RESOURCE_CREATION, &ResourceCreationProxy::Create);
    222   AddProxy(API_ID_PPP_CLASS, &PPP_Class_Proxy::Create);
    223   AddPPB(PPB_CORE_INTERFACE_1_0,
    224          PPB_Core_Proxy::GetPPB_Core_Interface(), PERMISSION_NONE);
    225   AddPPB(PPB_MESSAGELOOP_INTERFACE_1_0,
    226          PPB_MessageLoop_Proxy::GetInterface(), PERMISSION_NONE);
    227   AddPPB(PPB_OPENGLES2_INTERFACE_1_0,
    228          PPB_OpenGLES2_Shared::GetInterface(), PERMISSION_NONE);
    229   AddPPB(PPB_OPENGLES2_INSTANCEDARRAYS_INTERFACE_1_0,
    230          PPB_OpenGLES2_Shared::GetInstancedArraysInterface(), PERMISSION_NONE);
    231   AddPPB(PPB_OPENGLES2_FRAMEBUFFERBLIT_INTERFACE_1_0,
    232          PPB_OpenGLES2_Shared::GetFramebufferBlitInterface(), PERMISSION_NONE);
    233   AddPPB(PPB_OPENGLES2_FRAMEBUFFERMULTISAMPLE_INTERFACE_1_0,
    234          PPB_OpenGLES2_Shared::GetFramebufferMultisampleInterface(),
    235          PERMISSION_NONE);
    236   AddPPB(PPB_OPENGLES2_CHROMIUMENABLEFEATURE_INTERFACE_1_0,
    237          PPB_OpenGLES2_Shared::GetChromiumEnableFeatureInterface(),
    238          PERMISSION_NONE);
    239   AddPPB(PPB_OPENGLES2_CHROMIUMMAPSUB_INTERFACE_1_0,
    240          PPB_OpenGLES2_Shared::GetChromiumMapSubInterface(), PERMISSION_NONE);
    241   AddPPB(PPB_OPENGLES2_CHROMIUMMAPSUB_DEV_INTERFACE_1_0,
    242          PPB_OpenGLES2_Shared::GetChromiumMapSubInterface(), PERMISSION_NONE);
    243   AddPPB(PPB_OPENGLES2_QUERY_INTERFACE_1_0,
    244          PPB_OpenGLES2_Shared::GetQueryInterface(), PERMISSION_NONE);
    245   AddPPB(PPB_OPENGLES2_VERTEXARRAYOBJECT_INTERFACE_1_0,
    246          PPB_OpenGLES2_Shared::GetVertexArrayObjectInterface(),
    247          PERMISSION_NONE);
    248   AddPPB(PPB_OPENGLES2_DRAWBUFFERS_DEV_INTERFACE_1_0,
    249          PPB_OpenGLES2_Shared::GetDrawBuffersInterface(),
    250          PERMISSION_DEV);
    251   AddPPB(PPB_VAR_ARRAY_BUFFER_INTERFACE_1_0,
    252          PPB_Var_Shared::GetVarArrayBufferInterface1_0(),
    253          PERMISSION_NONE);
    254   AddPPB(PPB_VAR_INTERFACE_1_2,
    255          PPB_Var_Shared::GetVarInterface1_2(), PERMISSION_NONE);
    256   AddPPB(PPB_VAR_INTERFACE_1_1,
    257          PPB_Var_Shared::GetVarInterface1_1(), PERMISSION_NONE);
    258   AddPPB(PPB_VAR_INTERFACE_1_0,
    259          PPB_Var_Shared::GetVarInterface1_0(), PERMISSION_NONE);
    260 
    261 #if !defined(OS_NACL)
    262   // PPB (browser) interfaces.
    263   // Do not add more stuff here, they should be added to interface_list*.h
    264   // TODO(brettw) remove these.
    265   AddProxy(API_ID_PPB_INSTANCE_PRIVATE, &ProxyFactory<PPB_Instance_Proxy>);
    266   AddPPB(PPB_INSTANCE_PRIVATE_INTERFACE_0_1,
    267          thunk::GetPPB_Instance_Private_0_1_Thunk(),
    268          PERMISSION_PRIVATE);
    269 
    270   AddProxy(API_ID_PPB_VAR_DEPRECATED, &ProxyFactory<PPB_Var_Deprecated_Proxy>);
    271   AddPPB(PPB_VAR_DEPRECATED_INTERFACE,
    272          PPB_Var_Deprecated_Proxy::GetProxyInterface(), PERMISSION_DEV);
    273 
    274   // TODO(tomfinegan): Figure out where to put these once we refactor things
    275   // to load the PPP interface struct from the PPB interface.
    276   AddProxy(API_ID_PPP_CONTENT_DECRYPTOR_PRIVATE,
    277            &ProxyFactory<PPP_ContentDecryptor_Private_Proxy>);
    278   AddPPP(PPP_CONTENTDECRYPTOR_PRIVATE_INTERFACE,
    279          PPP_ContentDecryptor_Private_Proxy::GetProxyInterface());
    280 #endif
    281   AddProxy(API_ID_PPB_TESTING, &ProxyFactory<PPB_Testing_Proxy>);
    282   AddPPB(PPB_TESTING_PRIVATE_INTERFACE,
    283          PPB_Testing_Proxy::GetProxyInterface(), PERMISSION_TESTING);
    284 
    285   // PPP (plugin) interfaces.
    286   // TODO(brettw) move these to interface_list*.h
    287   AddProxy(API_ID_PPP_GRAPHICS_3D, &ProxyFactory<PPP_Graphics3D_Proxy>);
    288   AddPPP(PPP_GRAPHICS_3D_INTERFACE, PPP_Graphics3D_Proxy::GetProxyInterface());
    289   AddProxy(API_ID_PPP_INPUT_EVENT, &ProxyFactory<PPP_InputEvent_Proxy>);
    290   AddPPP(PPP_INPUT_EVENT_INTERFACE, PPP_InputEvent_Proxy::GetProxyInterface());
    291   AddProxy(API_ID_PPP_INSTANCE, &ProxyFactory<PPP_Instance_Proxy>);
    292 #if !defined(OS_NACL)
    293   AddPPP(PPP_INSTANCE_INTERFACE_1_1,
    294          PPP_Instance_Proxy::GetInstanceInterface());
    295   AddProxy(API_ID_PPP_INSTANCE_PRIVATE,
    296            &ProxyFactory<PPP_Instance_Private_Proxy>);
    297   AddPPP(PPP_INSTANCE_PRIVATE_INTERFACE,
    298          PPP_Instance_Private_Proxy::GetProxyInterface());
    299 #endif
    300   AddProxy(API_ID_PPP_MESSAGING, &ProxyFactory<PPP_Messaging_Proxy>);
    301   AddProxy(API_ID_PPP_MOUSE_LOCK, &ProxyFactory<PPP_MouseLock_Proxy>);
    302   AddPPP(PPP_MOUSELOCK_INTERFACE, PPP_MouseLock_Proxy::GetProxyInterface());
    303   AddProxy(API_ID_PPP_PRINTING, &ProxyFactory<PPP_Printing_Proxy>);
    304   AddPPP(PPP_PRINTING_DEV_INTERFACE, PPP_Printing_Proxy::GetProxyInterface());
    305   AddProxy(API_ID_PPP_TEXT_INPUT, &ProxyFactory<PPP_TextInput_Proxy>);
    306   AddPPP(PPP_TEXTINPUT_DEV_INTERFACE, PPP_TextInput_Proxy::GetProxyInterface());
    307 #if !defined(OS_NACL)
    308   AddProxy(API_ID_PPP_PDF, &ProxyFactory<PPP_Pdf_Proxy>);
    309   AddPPP(PPP_PDF_INTERFACE, PPP_Pdf_Proxy::GetProxyInterface());
    310   AddProxy(API_ID_PPP_FIND_PRIVATE, &ProxyFactory<PPP_Find_Proxy>);
    311   AddPPP(PPP_FIND_PRIVATE_INTERFACE, PPP_Find_Proxy::GetProxyInterface());
    312   AddProxy(API_ID_PPP_VIDEO_DECODER_DEV, &ProxyFactory<PPP_VideoDecoder_Proxy>);
    313   AddPPP(PPP_VIDEODECODER_DEV_INTERFACE,
    314          PPP_VideoDecoder_Proxy::GetProxyInterface());
    315 #endif
    316 }
    317 
    318 InterfaceList::~InterfaceList() {
    319 }
    320 
    321 // static
    322 InterfaceList* InterfaceList::GetInstance() {
    323   // CAUTION: This function is called without the ProxyLock to avoid excessive
    324   // excessive locking from C++ wrappers. (See also GetBrowserInterface.)
    325   return Singleton<InterfaceList>::get();
    326 }
    327 
    328 // static
    329 void InterfaceList::SetProcessGlobalPermissions(
    330     const PpapiPermissions& permissions) {
    331   g_process_global_permissions.Get() = permissions;
    332 }
    333 
    334 InterfaceProxy::Factory InterfaceList::GetFactoryForID(ApiID id) const {
    335   int index = static_cast<int>(id);
    336   COMPILE_ASSERT(API_ID_NONE == 0, none_must_be_zero);
    337   if (id <= 0 || id >= API_ID_COUNT)
    338     return NULL;
    339   return id_to_factory_[index];
    340 }
    341 
    342 const void* InterfaceList::GetInterfaceForPPB(const std::string& name) {
    343   // CAUTION: This function is called without the ProxyLock to avoid excessive
    344   // excessive locking from C++ wrappers. (See also GetBrowserInterface.)
    345   NameToInterfaceInfoMap::iterator found =
    346       name_to_browser_info_.find(name);
    347   if (found == name_to_browser_info_.end())
    348     return NULL;
    349 
    350   if (g_process_global_permissions.Get().HasPermission(
    351           found->second->required_permission())) {
    352     // Only log interface use once per plugin.
    353     found->second->LogWithUmaOnce(
    354         PluginGlobals::Get()->GetBrowserSender(), name);
    355     return found->second->iface();
    356   }
    357   return NULL;
    358 }
    359 
    360 const void* InterfaceList::GetInterfaceForPPP(const std::string& name) const {
    361   NameToInterfaceInfoMap::const_iterator found =
    362       name_to_plugin_info_.find(name);
    363   if (found == name_to_plugin_info_.end())
    364     return NULL;
    365   return found->second->iface();
    366 }
    367 
    368 void InterfaceList::InterfaceInfo::LogWithUmaOnce(
    369     IPC::Sender* sender, const std::string& name) {
    370   {
    371     base::AutoLock acquire(sent_to_uma_lock_);
    372     if (sent_to_uma_)
    373       return;
    374     sent_to_uma_ = true;
    375   }
    376   int hash = InterfaceList::HashInterfaceName(name);
    377   PluginGlobals::Get()->GetBrowserSender()->Send(
    378       new PpapiHostMsg_LogInterfaceUsage(hash));
    379 }
    380 
    381 void InterfaceList::AddProxy(ApiID id,
    382                              InterfaceProxy::Factory factory) {
    383   // For interfaces with no corresponding _Proxy objects, the macros will
    384   // generate calls to this function with API_ID_NONE. This means we
    385   // should just skip adding a factory for these functions.
    386   if (id == API_ID_NONE)
    387     return;
    388 
    389   // The factory should be an exact dupe of the one we already have if it
    390   // has already been registered before.
    391   int index = static_cast<int>(id);
    392   DCHECK(!id_to_factory_[index] || id_to_factory_[index] == factory);
    393 
    394   id_to_factory_[index] = factory;
    395 }
    396 
    397 void InterfaceList::AddPPB(const char* name,
    398                            const void* iface,
    399                            Permission perm) {
    400   DCHECK(name_to_browser_info_.find(name) == name_to_browser_info_.end());
    401   name_to_browser_info_.add(
    402       name, scoped_ptr<InterfaceInfo>(new InterfaceInfo(iface, perm)));
    403 }
    404 
    405 void InterfaceList::AddPPP(const char* name,
    406                            const void* iface) {
    407   DCHECK(name_to_plugin_info_.find(name) == name_to_plugin_info_.end());
    408   name_to_plugin_info_.add(
    409       name,
    410       scoped_ptr<InterfaceInfo>(new InterfaceInfo(iface, PERMISSION_NONE)));
    411 }
    412 
    413 int InterfaceList::HashInterfaceName(const std::string& name) {
    414   uint32 data = base::Hash(name.c_str(), name.size());
    415   // Strip off the signed bit because UMA doesn't support negative values,
    416   // but takes a signed int as input.
    417   return static_cast<int>(data & 0x7fffffff);
    418 }
    419 
    420 }  // namespace proxy
    421 }  // namespace ppapi
    422