content/renderer/render_thread_impl.h

   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 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
   6 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/cancelable_callback.h"
  13 #include "base/memory/memory_pressure_listener.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/metrics/user_metrics_action.h"
  16 #include "base/observer_list.h"
  17 #include "base/strings/string16.h"
  18 #include "base/threading/thread_checker.h"
  19 #include "base/timer/timer.h"
  20 #include "build/build_config.h"
  21 #include "content/child/child_thread_impl.h"
  22 #include "content/common/content_export.h"
  23 #include "content/common/frame_replication_state.h"
  24 #include "content/common/gpu/client/gpu_channel_host.h"
  25 #include "content/common/gpu/gpu_result_codes.h"
  26 #include "content/public/renderer/render_thread.h"
  27 #include "content/renderer/gpu/compositor_dependencies.h"
  28 #include "net/base/network_change_notifier.h"
  29 #include "third_party/WebKit/public/platform/WebConnectionType.h"
  30 #include "ui/gfx/native_widget_types.h"
  31
  32 #if defined(OS_MACOSX)
  33 #include "third_party/WebKit/public/web/mac/WebScrollbarTheme.h"
  34 #endif
  35
  36 class GrContext;
  37 class SkBitmap;
  38 struct FrameMsg_NewFrame_WidgetParams;
  39 struct ViewMsg_New_Params;
  40 struct WorkerProcessMsg_CreateWorker_Params;
  41
  42 namespace blink {
  43 class WebGamepads;
  44 class WebGraphicsContext3D;
  45 class WebMediaStreamCenter;
  46 class WebMediaStreamCenterClient;
  47 }
  48
  49 namespace base {
  50 class MessageLoopProxy;
  51 class SingleThreadTaskRunner;
  52 class Thread;
  53 }
  54
  55 namespace cc {
  56 class ContextProvider;
  57 }
  58
  59 namespace cc_blink {
  60 class ContextProviderWebContext;
  61 }
  62
  63 namespace IPC {
  64 class MessageFilter;
  65 }
  66
  67 namespace media {
  68 class AudioHardwareConfig;
  69 class GpuVideoAcceleratorFactories;
  70 }
  71
  72 namespace v8 {
  73 class Extension;
  74 }
  75
  76 namespace content {
  77
  78 class AppCacheDispatcher;
  79 class AecDumpMessageFilter;
  80 class AudioInputMessageFilter;
  81 class AudioMessageFilter;
  82 class AudioRendererMixerManager;
  83 class BrowserPluginManager;
  84 class CompositorForwardingMessageFilter;
  85 class ContextProviderCommandBuffer;
  86 class DBMessageFilter;
  87 class DevToolsAgentFilter;
  88 class DomStorageDispatcher;
  89 class EmbeddedWorkerDispatcher;
  90 class GpuChannelHost;
  91 class IndexedDBDispatcher;
  92 class InputHandlerManager;
  93 class MediaStreamCenter;
  94 class MemoryObserver;
  95 class PeerConnectionDependencyFactory;
  96 class MidiMessageFilter;
  97 class NetInfoDispatcher;
  98 class P2PSocketDispatcher;
  99 class PeerConnectionTracker;
 100 class RenderProcessObserver;
 101 class RendererBlinkPlatformImpl;
 102 class RendererDemuxerAndroid;
 103 class RendererScheduler;
 104 class ResourceSchedulingFilter;
 105 class V8SamplingProfiler;
 106 class VideoCaptureImplManager;
 107 class WebGraphicsContext3DCommandBufferImpl;
 108 class WebRTCIdentityService;
 109
 110 #if defined(COMPILER_MSVC)
 111 // See explanation for other RenderViewHostImpl which is the same issue.
 112 #pragma warning(push)
 113 #pragma warning(disable: 4250)
 114 #endif
 115
 116 // The RenderThreadImpl class represents a background thread where RenderView
 117 // instances live.  The RenderThread supports an API that is used by its
 118 // consumer to talk indirectly to the RenderViews and supporting objects.
 119 // Likewise, it provides an API for the RenderViews to talk back to the main
 120 // process (i.e., their corresponding WebContentsImpl).
 121 //
 122 // Most of the communication occurs in the form of IPC messages.  They are
 123 // routed to the RenderThread according to the routing IDs of the messages.
 124 // The routing IDs correspond to RenderView instances.
 125 class CONTENT_EXPORT RenderThreadImpl
 126     : public RenderThread,
 127       public ChildThreadImpl,
 128       public GpuChannelHostFactory,
 129       NON_EXPORTED_BASE(public CompositorDependencies) {
 130  public:
 131   static RenderThreadImpl* current();
 132
 133   RenderThreadImpl();
 134   // Constructor that's used when running in single process mode.
 135   explicit RenderThreadImpl(const std::string& channel_name);
 136   // Constructor that's used in RendererMain.
 137   explicit RenderThreadImpl(scoped_ptr<base::MessageLoop> main_message_loop);
 138   ~RenderThreadImpl() override;
 139   void Shutdown() override;
 140
 141   // When initializing WebKit, ensure that any schemes needed for the content
 142   // module are registered properly.  Static to allow sharing with tests.
 143   static void RegisterSchemes();
 144
 145   // Notify V8 that the date/time configuration of the system might have
 146   // changed.
 147   static void NotifyTimezoneChange();
 148
 149   // RenderThread implementation:
 150   bool Send(IPC::Message* msg) override;
 151   scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() override;
 152   IPC::SyncChannel* GetChannel() override;
 153   std::string GetLocale() override;
 154   IPC::SyncMessageFilter* GetSyncMessageFilter() override;
 155   scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() override;
 156   void AddRoute(int32 routing_id, IPC::Listener* listener) override;
 157   void RemoveRoute(int32 routing_id) override;
 158   int GenerateRoutingID() override;
 159   void AddFilter(IPC::MessageFilter* filter) override;
 160   void RemoveFilter(IPC::MessageFilter* filter) override;
 161   void AddObserver(RenderProcessObserver* observer) override;
 162   void RemoveObserver(RenderProcessObserver* observer) override;
 163   void SetResourceDispatcherDelegate(
 164       ResourceDispatcherDelegate* delegate) override;
 165   void EnsureWebKitInitialized() override;
 166   void RecordAction(const base::UserMetricsAction& action) override;
 167   void RecordComputedAction(const std::string& action) override;
 168   scoped_ptr<base::SharedMemory> HostAllocateSharedMemoryBuffer(
 169       size_t buffer_size) override;
 170   cc::SharedBitmapManager* GetSharedBitmapManager() override;
 171   void RegisterExtension(v8::Extension* extension) override;
 172   void ScheduleIdleHandler(int64 initial_delay_ms) override;
 173   void IdleHandler() override;
 174   int64 GetIdleNotificationDelayInMs() const override;
 175   void SetIdleNotificationDelayInMs(
 176       int64 idle_notification_delay_in_ms) override;
 177   void UpdateHistograms(int sequence_number) override;
 178   int PostTaskToAllWebWorkers(const base::Closure& closure) override;
 179   bool ResolveProxy(const GURL& url, std::string* proxy_list) override;
 180   base::WaitableEvent* GetShutdownEvent() override;
 181   ServiceRegistry* GetServiceRegistry() override;
 182
 183   // CompositorDependencies implementation.
 184   bool IsImplSidePaintingEnabled() override;
 185   bool IsGpuRasterizationForced() override;
 186   bool IsGpuRasterizationEnabled() override;
 187   bool IsThreadedGpuRasterizationEnabled() override;
 188   int GetGpuRasterizationMSAASampleCount() override;
 189   bool IsLcdTextEnabled() override;
 190   bool IsDistanceFieldTextEnabled() override;
 191   bool IsZeroCopyEnabled() override;
 192   bool IsOneCopyEnabled() override;
 193   bool IsElasticOverscrollEnabled() override;
 194   bool UseSingleThreadScheduler() override;
 195   uint32 GetImageTextureTarget() override;
 196   scoped_refptr<base::SingleThreadTaskRunner>
 197   GetCompositorMainThreadTaskRunner() override;
 198   scoped_refptr<base::SingleThreadTaskRunner>
 199   GetCompositorImplThreadTaskRunner() override;
 200   gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
 201   RendererScheduler* GetRendererScheduler() override;
 202   cc::ContextProvider* GetSharedMainThreadContextProvider() override;
 203   scoped_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
 204       int routing_id) override;
 205
 206   // Synchronously establish a channel to the GPU plugin if not previously
 207   // established or if it has been lost (for example if the GPU plugin crashed).
 208   // If there is a pending asynchronous request, it will be completed by the
 209   // time this routine returns.
 210   GpuChannelHost* EstablishGpuChannelSync(CauseForGpuLaunch);
 211
 212
 213   // These methods modify how the next message is sent.  Normally, when sending
 214   // a synchronous message that runs a nested message loop, we need to suspend
 215   // callbacks into WebKit.  This involves disabling timers and deferring
 216   // resource loads.  However, there are exceptions when we need to customize
 217   // the behavior.
 218   void DoNotSuspendWebKitSharedTimer();
 219   void DoNotNotifyWebKitOfModalLoop();
 220
 221   // True if we are running layout tests. This currently disables forwarding
 222   // various status messages to the console, skips network error pages, and
 223   // short circuits size update and focus events.
 224   bool layout_test_mode() const {
 225     return layout_test_mode_;
 226   }
 227   void set_layout_test_mode(bool layout_test_mode) {
 228     layout_test_mode_ = layout_test_mode;
 229   }
 230
 231   RendererBlinkPlatformImpl* blink_platform_impl() const {
 232     DCHECK(blink_platform_impl_);
 233     return blink_platform_impl_.get();
 234   }
 235
 236   CompositorForwardingMessageFilter* compositor_message_filter() const {
 237     return compositor_message_filter_.get();
 238   }
 239
 240   InputHandlerManager* input_handler_manager() const {
 241     return input_handler_manager_.get();
 242   }
 243
 244   // Will be null if threaded compositing has not been enabled.
 245   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy() const {
 246     return compositor_message_loop_proxy_;
 247   }
 248
 249   AppCacheDispatcher* appcache_dispatcher() const {
 250     return appcache_dispatcher_.get();
 251   }
 252
 253   DomStorageDispatcher* dom_storage_dispatcher() const {
 254     return dom_storage_dispatcher_.get();
 255   }
 256
 257   EmbeddedWorkerDispatcher* embedded_worker_dispatcher() const {
 258     return embedded_worker_dispatcher_.get();
 259   }
 260
 261   AudioInputMessageFilter* audio_input_message_filter() {
 262     return audio_input_message_filter_.get();
 263   }
 264
 265   AudioMessageFilter* audio_message_filter() {
 266     return audio_message_filter_.get();
 267   }
 268
 269   MidiMessageFilter* midi_message_filter() {
 270     return midi_message_filter_.get();
 271   }
 272
 273 #if defined(OS_ANDROID)
 274   RendererDemuxerAndroid* renderer_demuxer() {
 275     return renderer_demuxer_.get();
 276   }
 277 #endif
 278
 279   // Creates the embedder implementation of WebMediaStreamCenter.
 280   // The resulting object is owned by WebKit and deleted by WebKit at tear-down.
 281   blink::WebMediaStreamCenter* CreateMediaStreamCenter(
 282       blink::WebMediaStreamCenterClient* client);
 283
 284   BrowserPluginManager* browser_plugin_manager() const {
 285     return browser_plugin_manager_.get();
 286   }
 287
 288 #if defined(ENABLE_WEBRTC)
 289   // Returns a factory used for creating RTC PeerConnection objects.
 290   PeerConnectionDependencyFactory* GetPeerConnectionDependencyFactory();
 291
 292   PeerConnectionTracker* peer_connection_tracker() {
 293     return peer_connection_tracker_.get();
 294   }
 295
 296   // Current P2PSocketDispatcher. Set to NULL if P2P API is disabled.
 297   P2PSocketDispatcher* p2p_socket_dispatcher() {
 298     return p2p_socket_dispatcher_.get();
 299   }
 300 #endif
 301
 302   VideoCaptureImplManager* video_capture_impl_manager() const {
 303     return vc_manager_.get();
 304   }
 305
 306   // Get the GPU channel. Returns NULL if the channel is not established or
 307   // has been lost.
 308   GpuChannelHost* GetGpuChannel();
 309
 310   // Returns a MessageLoopProxy instance corresponding to the message loop
 311   // of the thread on which file operations should be run. Must be called
 312   // on the renderer's main thread.
 313   scoped_refptr<base::MessageLoopProxy> GetFileThreadMessageLoopProxy();
 314
 315   // Returns a SingleThreadTaskRunner instance corresponding to the message loop
 316   // of the thread on which media operations should be run. Must be called
 317   // on the renderer's main thread.
 318   scoped_refptr<base::SingleThreadTaskRunner> GetMediaThreadTaskRunner();
 319
 320   // Causes the idle handler to skip sending idle notifications
 321   // on the two next scheduled calls, so idle notifications are
 322   // not sent for at least one notification delay.
 323   void PostponeIdleNotification();
 324
 325   scoped_refptr<media::GpuVideoAcceleratorFactories> GetGpuFactories();
 326
 327   scoped_refptr<cc_blink::ContextProviderWebContext>
 328   SharedMainThreadContextProvider();
 329
 330   // AudioRendererMixerManager instance which manages renderer side mixer
 331   // instances shared based on configured audio parameters.  Lazily created on
 332   // first call.
 333   AudioRendererMixerManager* GetAudioRendererMixerManager();
 334
 335   // AudioHardwareConfig contains audio hardware configuration for
 336   // renderer side clients.  Creation requires a synchronous IPC call so it is
 337   // lazily created on the first call.
 338   media::AudioHardwareConfig* GetAudioHardwareConfig();
 339
 340 #if defined(OS_WIN)
 341   void PreCacheFontCharacters(const LOGFONT& log_font,
 342                               const base::string16& str);
 343 #endif
 344
 345 #if defined(ENABLE_WEBRTC)
 346   WebRTCIdentityService* get_webrtc_identity_service() {
 347     return webrtc_identity_service_.get();
 348   }
 349 #endif
 350
 351   // For producing custom V8 histograms. Custom histograms are produced if all
 352   // RenderViews share the same host, and the host is in the pre-specified set
 353   // of hosts we want to produce custom diagrams for. The name for a custom
 354   // diagram is the name of the corresponding generic diagram plus a
 355   // host-specific suffix.
 356   class CONTENT_EXPORT HistogramCustomizer {
 357    public:
 358     HistogramCustomizer();
 359     ~HistogramCustomizer();
 360
 361     // Called when a top frame of a RenderView navigates. This function updates
 362     // RenderThreadImpl's information about whether all RenderViews are
 363     // displaying a page from the same host. |host| is the host where a
 364     // RenderView navigated, and |view_count| is the number of RenderViews in
 365     // this process.
 366     void RenderViewNavigatedToHost(const std::string& host, size_t view_count);
 367
 368     // Used for customizing some histograms if all RenderViews share the same
 369     // host. Returns the current custom histogram name to use for
 370     // |histogram_name|, or |histogram_name| if it shouldn't be customized.
 371     std::string ConvertToCustomHistogramName(const char* histogram_name) const;
 372
 373    private:
 374     friend class RenderThreadImplUnittest;
 375
 376     // Used for updating the information on which is the common host which all
 377     // RenderView's share (if any). If there is no common host, this function is
 378     // called with an empty string.
 379     void SetCommonHost(const std::string& host);
 380
 381     // The current common host of the RenderViews; empty string if there is no
 382     // common host.
 383     std::string common_host_;
 384     // The corresponding suffix.
 385     std::string common_host_histogram_suffix_;
 386     // Set of histograms for which we want to produce a custom histogram if
 387     // possible.
 388     std::set<std::string> custom_histograms_;
 389
 390     DISALLOW_COPY_AND_ASSIGN(HistogramCustomizer);
 391   };
 392
 393   HistogramCustomizer* histogram_customizer() {
 394     return &histogram_customizer_;
 395   }
 396
 397   // Retrieve current gamepad data.
 398   void SampleGamepads(blink::WebGamepads* data);
 399
 400   // Called by a RenderWidget when it is created or destroyed. This
 401   // allows the process to know when there are no visible widgets.
 402   void WidgetCreated();
 403   void WidgetDestroyed();
 404   void WidgetHidden();
 405   void WidgetRestored();
 406
 407   void AddEmbeddedWorkerRoute(int32 routing_id, IPC::Listener* listener);
 408   void RemoveEmbeddedWorkerRoute(int32 routing_id);
 409
 410   void RegisterPendingRenderFrameConnect(
 411       int routing_id,
 412       mojo::InterfaceRequest<mojo::ServiceProvider> services,
 413       mojo::ServiceProviderPtr exposed_services);
 414
 415  protected:
 416   virtual void SetResourceDispatchTaskQueue(
 417     const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
 418
 419  private:
 420   // ChildThread
 421   bool OnControlMessageReceived(const IPC::Message& msg) override;
 422
 423   // GpuChannelHostFactory implementation:
 424   bool IsMainThread() override;
 425   base::MessageLoop* GetMainLoop() override;
 426   scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
 427   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
 428   CreateCommandBufferResult CreateViewCommandBuffer(
 429       int32 surface_id,
 430       const GPUCreateCommandBufferConfig& init_params,
 431       int32 route_id) override;
 432
 433   void Init();
 434
 435   void OnCreateNewFrame(int routing_id,
 436                         int parent_routing_id,
 437                         int proxy_routing_id,
 438                         const FrameReplicationState& replicated_state,
 439                         FrameMsg_NewFrame_WidgetParams params);
 440   void OnCreateNewFrameProxy(int routing_id,
 441                              int parent_routing_id,
 442                              int render_view_routing_id,
 443                              const FrameReplicationState& replicated_state);
 444   void OnSetZoomLevelForCurrentURL(const std::string& scheme,
 445                                    const std::string& host,
 446                                    double zoom_level);
 447   void OnCreateNewView(const ViewMsg_New_Params& params);
 448   void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
 449 #if defined(ENABLE_PLUGINS)
 450   void OnPurgePluginListCache(bool reload_pages);
 451 #endif
 452   void OnNetworkTypeChanged(net::NetworkChangeNotifier::ConnectionType type);
 453   void OnGetAccessibilityTree();
 454   void OnTempCrashWithData(const GURL& data);
 455   void OnUpdateTimezone();
 456   void OnMemoryPressure(
 457       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
 458 #if defined(OS_ANDROID)
 459   void OnSetWebKitSharedTimersSuspended(bool suspend);
 460 #endif
 461 #if defined(OS_MACOSX)
 462   void OnUpdateScrollbarTheme(float initial_button_delay,
 463                               float autoscroll_button_delay,
 464                               bool jump_on_track_click,
 465                               blink::ScrollerStyle preferred_scroller_style,
 466                               bool redraw);
 467 #endif
 468   void OnCreateNewSharedWorker(
 469       const WorkerProcessMsg_CreateWorker_Params& params);
 470
 471   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext3d();
 472
 473   // These objects live solely on the render thread.
 474   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
 475   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
 476   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
 477   scoped_ptr<RendererScheduler> renderer_scheduler_;
 478   scoped_ptr<RendererBlinkPlatformImpl> blink_platform_impl_;
 479   scoped_ptr<EmbeddedWorkerDispatcher> embedded_worker_dispatcher_;
 480
 481   // Used on the render thread and deleted by WebKit at shutdown.
 482   blink::WebMediaStreamCenter* media_stream_center_;
 483
 484   // Used on the renderer and IPC threads.
 485   scoped_refptr<DBMessageFilter> db_message_filter_;
 486   scoped_refptr<AudioInputMessageFilter> audio_input_message_filter_;
 487   scoped_refptr<AudioMessageFilter> audio_message_filter_;
 488   scoped_refptr<MidiMessageFilter> midi_message_filter_;
 489 #if defined(OS_ANDROID)
 490   scoped_refptr<RendererDemuxerAndroid> renderer_demuxer_;
 491 #endif
 492   scoped_refptr<DevToolsAgentFilter> devtools_agent_message_filter_;
 493   scoped_ptr<V8SamplingProfiler> v8_sampling_profiler_;
 494
 495   scoped_ptr<BrowserPluginManager> browser_plugin_manager_;
 496
 497 #if defined(ENABLE_WEBRTC)
 498   scoped_ptr<PeerConnectionDependencyFactory> peer_connection_factory_;
 499
 500   // This is used to communicate to the browser process the status
 501   // of all the peer connections created in the renderer.
 502   scoped_ptr<PeerConnectionTracker> peer_connection_tracker_;
 503
 504   // Dispatches all P2P sockets.
 505   scoped_refptr<P2PSocketDispatcher> p2p_socket_dispatcher_;
 506 #endif
 507
 508   // Used on the render thread.
 509   scoped_ptr<VideoCaptureImplManager> vc_manager_;
 510
 511   // Used for communicating registering AEC dump consumers with the browser and
 512   // receving AEC dump file handles when AEC dump is enabled. An AEC dump is
 513   // diagnostic audio data for WebRTC stored locally when enabled by the user in
 514   // chrome://webrtc-internals.
 515   scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_;
 516
 517   // The count of RenderWidgets running through this thread.
 518   int widget_count_;
 519
 520   // The count of hidden RenderWidgets running through this thread.
 521   int hidden_widget_count_;
 522
 523   // The current value of the idle notification timer delay.
 524   int64 idle_notification_delay_in_ms_;
 525
 526   // The number of idle handler calls that skip sending idle notifications.
 527   int idle_notifications_to_skip_;
 528
 529   bool suspend_webkit_shared_timer_;
 530   bool notify_webkit_of_modal_loop_;
 531   bool webkit_shared_timer_suspended_;
 532
 533   // The following flag is used to control layout test specific behavior.
 534   bool layout_test_mode_;
 535
 536   // Timer that periodically calls IdleHandler.
 537   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 538
 539   // The channel from the renderer process to the GPU process.
 540   scoped_refptr<GpuChannelHost> gpu_channel_;
 541
 542   // Cache of variables that are needed on the compositor thread by
 543   // GpuChannelHostFactory methods.
 544   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 545
 546   // The message loop of the renderer main thread.
 547   // This message loop should be destructed before the RenderThreadImpl
 548   // shuts down Blink.
 549   scoped_ptr<base::MessageLoop> main_message_loop_;
 550
 551   // A lazily initiated thread on which file operations are run.
 552   scoped_ptr<base::Thread> file_thread_;
 553
 554   // May be null if overridden by ContentRendererClient.
 555   scoped_ptr<base::Thread> compositor_thread_;
 556
 557   // Thread for running multimedia operations (e.g., video decoding).
 558   scoped_ptr<base::Thread> media_thread_;
 559
 560   // Will point to appropriate MessageLoopProxy after initialization,
 561   // regardless of whether |compositor_thread_| is overriden.
 562   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy_;
 563
 564   base::CancelableCallback<void(const IPC::Message&)> main_input_callback_;
 565   scoped_refptr<IPC::MessageFilter> input_event_filter_;
 566   scoped_ptr<InputHandlerManager> input_handler_manager_;
 567   scoped_refptr<CompositorForwardingMessageFilter> compositor_message_filter_;
 568
 569   scoped_refptr<cc_blink::ContextProviderWebContext>
 570       shared_main_thread_contexts_;
 571
 572   ObserverList<RenderProcessObserver> observers_;
 573
 574   scoped_refptr<ContextProviderCommandBuffer> gpu_va_context_provider_;
 575
 576   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
 577   scoped_ptr<media::AudioHardwareConfig> audio_hardware_config_;
 578
 579   HistogramCustomizer histogram_customizer_;
 580
 581   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 582
 583 #if defined(ENABLE_WEBRTC)
 584   scoped_ptr<WebRTCIdentityService> webrtc_identity_service_;
 585 #endif
 586
 587   scoped_ptr<MemoryObserver> memory_observer_;
 588
 589   scoped_refptr<base::SingleThreadTaskRunner>
 590       main_thread_compositor_task_runner_;
 591
 592   scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter_;
 593
 594   // Compositor settings.
 595   bool is_gpu_rasterization_enabled_;
 596   bool is_gpu_rasterization_forced_;
 597   int gpu_rasterization_msaa_sample_count_;
 598   bool is_threaded_gpu_rasterization_enabled_;
 599   bool is_impl_side_painting_enabled_;
 600   bool is_lcd_text_enabled_;
 601   bool is_distance_field_text_enabled_;
 602   bool is_zero_copy_enabled_;
 603   bool is_one_copy_enabled_;
 604   bool is_elastic_overscroll_enabled_;
 605   unsigned use_image_texture_target_;
 606
 607   struct PendingRenderFrameConnect
 608       : public base::RefCounted<PendingRenderFrameConnect> {
 609     PendingRenderFrameConnect(
 610         mojo::InterfaceRequest<mojo::ServiceProvider> services,
 611         mojo::ServiceProviderPtr exposed_services);
 612
 613     mojo::InterfaceRequest<mojo::ServiceProvider> services;
 614     mojo::ServiceProviderPtr exposed_services;
 615
 616    private:
 617     friend class base::RefCounted<PendingRenderFrameConnect>;
 618
 619     ~PendingRenderFrameConnect();
 620   };
 621
 622   typedef std::map<int, scoped_refptr<PendingRenderFrameConnect>>
 623       PendingRenderFrameConnectMap;
 624   PendingRenderFrameConnectMap pending_render_frame_connects_;
 625
 626   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 627 };
 628
 629 #if defined(COMPILER_MSVC)
 630 #pragma warning(pop)
 631 #endif
 632
 633 }  // namespace content
 634
 635 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_