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 "media/base/audio_hardware_config.h"
  29 #include "net/base/network_change_notifier.h"
  30 #include "third_party/WebKit/public/platform/WebConnectionType.h"
  31 #include "ui/gfx/native_widget_types.h"
  32
  33 #if defined(OS_MACOSX)
  34 #include "third_party/WebKit/public/web/mac/WebScrollbarTheme.h"
  35 #endif
  36
  37 class GrContext;
  38 class SkBitmap;
  39 struct FrameMsg_NewFrame_WidgetParams;
  40 struct ViewMsg_New_Params;
  41 struct WorkerProcessMsg_CreateWorker_Params;
  42
  43 namespace blink {
  44 class WebGamepads;
  45 class WebGraphicsContext3D;
  46 class WebMediaStreamCenter;
  47 class WebMediaStreamCenterClient;
  48 }
  49
  50 namespace base {
  51 class MessageLoopProxy;
  52 class SingleThreadTaskRunner;
  53 class Thread;
  54 }
  55
  56 namespace cc {
  57 class ContextProvider;
  58 class TaskGraphRunner;
  59 }
  60
  61 namespace cc_blink {
  62 class ContextProviderWebContext;
  63 }
  64
  65 namespace IPC {
  66 class MessageFilter;
  67 }
  68
  69 namespace media {
  70 class GpuVideoAcceleratorFactories;
  71 }
  72
  73 namespace v8 {
  74 class Extension;
  75 }
  76
  77 namespace content {
  78
  79 class AppCacheDispatcher;
  80 class AecDumpMessageFilter;
  81 class AudioInputMessageFilter;
  82 class AudioMessageFilter;
  83 class AudioRendererMixerManager;
  84 class BrowserPluginManager;
  85 class CompositorForwardingMessageFilter;
  86 class ContextProviderCommandBuffer;
  87 class DBMessageFilter;
  88 class DevToolsAgentFilter;
  89 class DomStorageDispatcher;
  90 class EmbeddedWorkerDispatcher;
  91 class GpuChannelHost;
  92 class IndexedDBDispatcher;
  93 class InputHandlerManager;
  94 class MediaStreamCenter;
  95 class MemoryObserver;
  96 class MidiMessageFilter;
  97 class NetInfoDispatcher;
  98 class P2PSocketDispatcher;
  99 class PeerConnectionDependencyFactory;
 100 class PeerConnectionTracker;
 101 class RenderProcessObserver;
 102 class RendererBlinkPlatformImpl;
 103 class RendererDemuxerAndroid;
 104 class RendererScheduler;
 105 class ResourceDispatchThrottler;
 106 class ResourceSchedulingFilter;
 107 class ServiceWorkerCacheStorageDispatcher;
 108 class V8SamplingProfiler;
 109 class VideoCaptureImplManager;
 110 class WebGraphicsContext3DCommandBufferImpl;
 111 class WebRTCIdentityService;
 112
 113 #if defined(COMPILER_MSVC)
 114 // See explanation for other RenderViewHostImpl which is the same issue.
 115 #pragma warning(push)
 116 #pragma warning(disable: 4250)
 117 #endif
 118
 119 // The RenderThreadImpl class represents a background thread where RenderView
 120 // instances live.  The RenderThread supports an API that is used by its
 121 // consumer to talk indirectly to the RenderViews and supporting objects.
 122 // Likewise, it provides an API for the RenderViews to talk back to the main
 123 // process (i.e., their corresponding WebContentsImpl).
 124 //
 125 // Most of the communication occurs in the form of IPC messages.  They are
 126 // routed to the RenderThread according to the routing IDs of the messages.
 127 // The routing IDs correspond to RenderView instances.
 128 class CONTENT_EXPORT RenderThreadImpl
 129     : public RenderThread,
 130       public ChildThreadImpl,
 131       public GpuChannelHostFactory,
 132       NON_EXPORTED_BASE(public CompositorDependencies) {
 133  public:
 134   static RenderThreadImpl* current();
 135
 136   explicit RenderThreadImpl(const InProcessChildThreadParams& params);
 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   cc::TaskGraphRunner* GetTaskGraphRunner() override;
 206   bool IsGatherPixelRefsEnabled() override;
 207
 208   // Synchronously establish a channel to the GPU plugin if not previously
 209   // established or if it has been lost (for example if the GPU plugin crashed).
 210   // If there is a pending asynchronous request, it will be completed by the
 211   // time this routine returns.
 212   GpuChannelHost* EstablishGpuChannelSync(CauseForGpuLaunch);
 213
 214
 215   // These methods modify how the next message is sent.  Normally, when sending
 216   // a synchronous message that runs a nested message loop, we need to suspend
 217   // callbacks into WebKit.  This involves disabling timers and deferring
 218   // resource loads.  However, there are exceptions when we need to customize
 219   // the behavior.
 220   void DoNotSuspendWebKitSharedTimer();
 221   void DoNotNotifyWebKitOfModalLoop();
 222
 223   // True if we are running layout tests. This currently disables forwarding
 224   // various status messages to the console, skips network error pages, and
 225   // short circuits size update and focus events.
 226   bool layout_test_mode() const {
 227     return layout_test_mode_;
 228   }
 229   void set_layout_test_mode(bool layout_test_mode) {
 230     layout_test_mode_ = layout_test_mode;
 231   }
 232
 233   RendererBlinkPlatformImpl* blink_platform_impl() const {
 234     DCHECK(blink_platform_impl_);
 235     return blink_platform_impl_.get();
 236   }
 237
 238   CompositorForwardingMessageFilter* compositor_message_filter() const {
 239     return compositor_message_filter_.get();
 240   }
 241
 242   InputHandlerManager* input_handler_manager() const {
 243     return input_handler_manager_.get();
 244   }
 245
 246   // Will be null if threaded compositing has not been enabled.
 247   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy() const {
 248     return compositor_message_loop_proxy_;
 249   }
 250
 251   AppCacheDispatcher* appcache_dispatcher() const {
 252     return appcache_dispatcher_.get();
 253   }
 254
 255   DomStorageDispatcher* dom_storage_dispatcher() const {
 256     return dom_storage_dispatcher_.get();
 257   }
 258
 259   EmbeddedWorkerDispatcher* embedded_worker_dispatcher() const {
 260     return embedded_worker_dispatcher_.get();
 261   }
 262
 263   AudioInputMessageFilter* audio_input_message_filter() {
 264     return audio_input_message_filter_.get();
 265   }
 266
 267   AudioMessageFilter* audio_message_filter() {
 268     return audio_message_filter_.get();
 269   }
 270
 271   MidiMessageFilter* midi_message_filter() {
 272     return midi_message_filter_.get();
 273   }
 274
 275 #if defined(OS_ANDROID)
 276   RendererDemuxerAndroid* renderer_demuxer() {
 277     return renderer_demuxer_.get();
 278   }
 279 #endif
 280
 281   // Creates the embedder implementation of WebMediaStreamCenter.
 282   // The resulting object is owned by WebKit and deleted by WebKit at tear-down.
 283   blink::WebMediaStreamCenter* CreateMediaStreamCenter(
 284       blink::WebMediaStreamCenterClient* client);
 285
 286   BrowserPluginManager* browser_plugin_manager() const {
 287     return browser_plugin_manager_.get();
 288   }
 289
 290 #if defined(ENABLE_WEBRTC)
 291   // Returns a factory used for creating RTC PeerConnection objects.
 292   PeerConnectionDependencyFactory* GetPeerConnectionDependencyFactory();
 293
 294   PeerConnectionTracker* peer_connection_tracker() {
 295     return peer_connection_tracker_.get();
 296   }
 297
 298   // Current P2PSocketDispatcher. Set to NULL if P2P API is disabled.
 299   P2PSocketDispatcher* p2p_socket_dispatcher() {
 300     return p2p_socket_dispatcher_.get();
 301   }
 302 #endif
 303
 304   VideoCaptureImplManager* video_capture_impl_manager() const {
 305     return vc_manager_.get();
 306   }
 307
 308   // Get the GPU channel. Returns NULL if the channel is not established or
 309   // has been lost.
 310   GpuChannelHost* GetGpuChannel();
 311
 312   // Returns a MessageLoopProxy instance corresponding to the message loop
 313   // of the thread on which file operations should be run. Must be called
 314   // on the renderer's main thread.
 315   scoped_refptr<base::MessageLoopProxy> GetFileThreadMessageLoopProxy();
 316
 317   // Returns a SingleThreadTaskRunner instance corresponding to the message loop
 318   // of the thread on which media operations should be run. Must be called
 319   // on the renderer's main thread.
 320   scoped_refptr<base::SingleThreadTaskRunner> GetMediaThreadTaskRunner();
 321
 322   // Causes the idle handler to skip sending idle notifications
 323   // on the two next scheduled calls, so idle notifications are
 324   // not sent for at least one notification delay.
 325   void PostponeIdleNotification();
 326
 327   scoped_refptr<media::GpuVideoAcceleratorFactories> GetGpuFactories();
 328
 329   scoped_refptr<cc_blink::ContextProviderWebContext>
 330   SharedMainThreadContextProvider();
 331
 332   // AudioRendererMixerManager instance which manages renderer side mixer
 333   // instances shared based on configured audio parameters.  Lazily created on
 334   // first call.
 335   AudioRendererMixerManager* GetAudioRendererMixerManager();
 336
 337   // AudioHardwareConfig contains audio hardware configuration for
 338   // renderer side clients.  Creation requires a synchronous IPC call so it is
 339   // lazily created on the first call.
 340   media::AudioHardwareConfig* GetAudioHardwareConfig();
 341
 342 #if defined(OS_WIN)
 343   void PreCacheFontCharacters(const LOGFONT& log_font,
 344                               const base::string16& str);
 345 #endif
 346
 347 #if defined(ENABLE_WEBRTC)
 348   WebRTCIdentityService* get_webrtc_identity_service() {
 349     return webrtc_identity_service_.get();
 350   }
 351 #endif
 352
 353   // For producing custom V8 histograms. Custom histograms are produced if all
 354   // RenderViews share the same host, and the host is in the pre-specified set
 355   // of hosts we want to produce custom diagrams for. The name for a custom
 356   // diagram is the name of the corresponding generic diagram plus a
 357   // host-specific suffix.
 358   class CONTENT_EXPORT HistogramCustomizer {
 359    public:
 360     HistogramCustomizer();
 361     ~HistogramCustomizer();
 362
 363     // Called when a top frame of a RenderView navigates. This function updates
 364     // RenderThreadImpl's information about whether all RenderViews are
 365     // displaying a page from the same host. |host| is the host where a
 366     // RenderView navigated, and |view_count| is the number of RenderViews in
 367     // this process.
 368     void RenderViewNavigatedToHost(const std::string& host, size_t view_count);
 369
 370     // Used for customizing some histograms if all RenderViews share the same
 371     // host. Returns the current custom histogram name to use for
 372     // |histogram_name|, or |histogram_name| if it shouldn't be customized.
 373     std::string ConvertToCustomHistogramName(const char* histogram_name) const;
 374
 375    private:
 376     friend class RenderThreadImplUnittest;
 377
 378     // Used for updating the information on which is the common host which all
 379     // RenderView's share (if any). If there is no common host, this function is
 380     // called with an empty string.
 381     void SetCommonHost(const std::string& host);
 382
 383     // The current common host of the RenderViews; empty string if there is no
 384     // common host.
 385     std::string common_host_;
 386     // The corresponding suffix.
 387     std::string common_host_histogram_suffix_;
 388     // Set of histograms for which we want to produce a custom histogram if
 389     // possible.
 390     std::set<std::string> custom_histograms_;
 391
 392     DISALLOW_COPY_AND_ASSIGN(HistogramCustomizer);
 393   };
 394
 395   HistogramCustomizer* histogram_customizer() {
 396     return &histogram_customizer_;
 397   }
 398
 399   // Retrieve current gamepad data.
 400   void SampleGamepads(blink::WebGamepads* data);
 401
 402   // Called by a RenderWidget when it is created or destroyed. This
 403   // allows the process to know when there are no visible widgets.
 404   void WidgetCreated();
 405   void WidgetDestroyed();
 406   void WidgetHidden();
 407   void WidgetRestored();
 408
 409   void AddEmbeddedWorkerRoute(int32 routing_id, IPC::Listener* listener);
 410   void RemoveEmbeddedWorkerRoute(int32 routing_id);
 411
 412   void RegisterPendingRenderFrameConnect(
 413       int routing_id,
 414       mojo::InterfaceRequest<mojo::ServiceProvider> services,
 415       mojo::ServiceProviderPtr exposed_services);
 416
 417  protected:
 418   virtual void SetResourceDispatchTaskQueue(
 419     const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
 420
 421  private:
 422   // ChildThread
 423   bool OnControlMessageReceived(const IPC::Message& msg) override;
 424
 425   // GpuChannelHostFactory implementation:
 426   bool IsMainThread() override;
 427   base::MessageLoop* GetMainLoop() override;
 428   scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
 429   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
 430   CreateCommandBufferResult CreateViewCommandBuffer(
 431       int32 surface_id,
 432       const GPUCreateCommandBufferConfig& init_params,
 433       int32 route_id) override;
 434
 435   void Init();
 436
 437   void OnCreateNewFrame(int routing_id,
 438                         int parent_routing_id,
 439                         int proxy_routing_id,
 440                         const FrameReplicationState& replicated_state,
 441                         FrameMsg_NewFrame_WidgetParams params);
 442   void OnCreateNewFrameProxy(int routing_id,
 443                              int parent_routing_id,
 444                              int render_view_routing_id,
 445                              const FrameReplicationState& replicated_state);
 446   void OnSetZoomLevelForCurrentURL(const std::string& scheme,
 447                                    const std::string& host,
 448                                    double zoom_level);
 449   void OnCreateNewView(const ViewMsg_New_Params& params);
 450   void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
 451 #if defined(ENABLE_PLUGINS)
 452   void OnPurgePluginListCache(bool reload_pages);
 453 #endif
 454   void OnNetworkTypeChanged(net::NetworkChangeNotifier::ConnectionType type);
 455   void OnGetAccessibilityTree();
 456   void OnSetAudioHardwareConfig(const media::AudioParameters& input,
 457                                 const media::AudioParameters& output);
 458   void OnTempCrashWithData(const GURL& data);
 459   void OnUpdateTimezone();
 460   void OnMemoryPressure(
 461       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
 462 #if defined(OS_ANDROID)
 463   void OnSetWebKitSharedTimersSuspended(bool suspend);
 464 #endif
 465 #if defined(OS_MACOSX)
 466   void OnUpdateScrollbarTheme(float initial_button_delay,
 467                               float autoscroll_button_delay,
 468                               bool jump_on_track_click,
 469                               blink::ScrollerStyle preferred_scroller_style,
 470                               bool redraw);
 471 #endif
 472   void OnCreateNewSharedWorker(
 473       const WorkerProcessMsg_CreateWorker_Params& params);
 474
 475   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext3d();
 476
 477   // These objects live solely on the render thread.
 478   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
 479   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
 480   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
 481   scoped_ptr<RendererScheduler> renderer_scheduler_;
 482   scoped_ptr<RendererBlinkPlatformImpl> blink_platform_impl_;
 483   scoped_ptr<ResourceDispatchThrottler> resource_dispatch_throttler_;
 484   scoped_ptr<ServiceWorkerCacheStorageDispatcher>
 485       main_thread_cache_storage_dispatcher_;
 486   scoped_ptr<EmbeddedWorkerDispatcher> embedded_worker_dispatcher_;
 487
 488   // Used on the render thread and deleted by WebKit at shutdown.
 489   blink::WebMediaStreamCenter* media_stream_center_;
 490
 491   // Used on the renderer and IPC threads.
 492   scoped_refptr<DBMessageFilter> db_message_filter_;
 493   scoped_refptr<AudioInputMessageFilter> audio_input_message_filter_;
 494   scoped_refptr<AudioMessageFilter> audio_message_filter_;
 495   scoped_refptr<MidiMessageFilter> midi_message_filter_;
 496 #if defined(OS_ANDROID)
 497   scoped_refptr<RendererDemuxerAndroid> renderer_demuxer_;
 498 #endif
 499   scoped_refptr<DevToolsAgentFilter> devtools_agent_message_filter_;
 500   scoped_ptr<V8SamplingProfiler> v8_sampling_profiler_;
 501
 502   scoped_ptr<BrowserPluginManager> browser_plugin_manager_;
 503
 504 #if defined(ENABLE_WEBRTC)
 505   scoped_ptr<PeerConnectionDependencyFactory> peer_connection_factory_;
 506
 507   // This is used to communicate to the browser process the status
 508   // of all the peer connections created in the renderer.
 509   scoped_ptr<PeerConnectionTracker> peer_connection_tracker_;
 510
 511   // Dispatches all P2P sockets.
 512   scoped_refptr<P2PSocketDispatcher> p2p_socket_dispatcher_;
 513 #endif
 514
 515   // Used on the render thread.
 516   scoped_ptr<VideoCaptureImplManager> vc_manager_;
 517
 518   // Used for communicating registering AEC dump consumers with the browser and
 519   // receving AEC dump file handles when AEC dump is enabled. An AEC dump is
 520   // diagnostic audio data for WebRTC stored locally when enabled by the user in
 521   // chrome://webrtc-internals.
 522   scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_;
 523
 524   // The count of RenderWidgets running through this thread.
 525   int widget_count_;
 526
 527   // The count of hidden RenderWidgets running through this thread.
 528   int hidden_widget_count_;
 529
 530   // The current value of the idle notification timer delay.
 531   int64 idle_notification_delay_in_ms_;
 532
 533   // The number of idle handler calls that skip sending idle notifications.
 534   int idle_notifications_to_skip_;
 535
 536   bool suspend_webkit_shared_timer_;
 537   bool notify_webkit_of_modal_loop_;
 538   bool webkit_shared_timer_suspended_;
 539
 540   // The following flag is used to control layout test specific behavior.
 541   bool layout_test_mode_;
 542
 543   // Timer that periodically calls IdleHandler.
 544   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 545
 546   // The channel from the renderer process to the GPU process.
 547   scoped_refptr<GpuChannelHost> gpu_channel_;
 548
 549   // Cache of variables that are needed on the compositor thread by
 550   // GpuChannelHostFactory methods.
 551   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 552
 553   // The message loop of the renderer main thread.
 554   // This message loop should be destructed before the RenderThreadImpl
 555   // shuts down Blink.
 556   scoped_ptr<base::MessageLoop> main_message_loop_;
 557
 558   // A lazily initiated thread on which file operations are run.
 559   scoped_ptr<base::Thread> file_thread_;
 560
 561   // May be null if overridden by ContentRendererClient.
 562   scoped_ptr<base::Thread> compositor_thread_;
 563
 564   // Thread for running multimedia operations (e.g., video decoding).
 565   scoped_ptr<base::Thread> media_thread_;
 566
 567   // Will point to appropriate MessageLoopProxy after initialization,
 568   // regardless of whether |compositor_thread_| is overriden.
 569   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy_;
 570
 571   // Threads used by compositor for rasterization.
 572   ScopedVector<base::SimpleThread> compositor_raster_threads_;
 573
 574   base::CancelableCallback<void(const IPC::Message&)> main_input_callback_;
 575   scoped_refptr<IPC::MessageFilter> input_event_filter_;
 576   scoped_ptr<InputHandlerManager> input_handler_manager_;
 577   scoped_refptr<CompositorForwardingMessageFilter> compositor_message_filter_;
 578
 579   scoped_refptr<cc_blink::ContextProviderWebContext>
 580       shared_main_thread_contexts_;
 581
 582   ObserverList<RenderProcessObserver> observers_;
 583
 584   scoped_refptr<ContextProviderCommandBuffer> gpu_va_context_provider_;
 585
 586   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
 587   media::AudioHardwareConfig audio_hardware_config_;
 588
 589   HistogramCustomizer histogram_customizer_;
 590
 591   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 592
 593 #if defined(ENABLE_WEBRTC)
 594   scoped_ptr<WebRTCIdentityService> webrtc_identity_service_;
 595 #endif
 596
 597   scoped_ptr<MemoryObserver> memory_observer_;
 598
 599   scoped_refptr<base::SingleThreadTaskRunner>
 600       main_thread_compositor_task_runner_;
 601
 602   scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter_;
 603
 604   scoped_ptr<cc::TaskGraphRunner> compositor_task_graph_runner_;
 605
 606   // Compositor settings.
 607   bool is_gpu_rasterization_enabled_;
 608   bool is_gpu_rasterization_forced_;
 609   int gpu_rasterization_msaa_sample_count_;
 610   bool is_threaded_gpu_rasterization_enabled_;
 611   bool is_impl_side_painting_enabled_;
 612   bool is_lcd_text_enabled_;
 613   bool is_distance_field_text_enabled_;
 614   bool is_zero_copy_enabled_;
 615   bool is_one_copy_enabled_;
 616   bool is_elastic_overscroll_enabled_;
 617   unsigned use_image_texture_target_;
 618   bool is_gather_pixel_refs_enabled_;
 619
 620   class PendingRenderFrameConnect
 621       : public base::RefCounted<PendingRenderFrameConnect>,
 622         public mojo::ErrorHandler {
 623    public:
 624     PendingRenderFrameConnect(
 625         int routing_id,
 626         mojo::InterfaceRequest<mojo::ServiceProvider> services,
 627         mojo::ServiceProviderPtr exposed_services);
 628
 629     mojo::InterfaceRequest<mojo::ServiceProvider>& services() {
 630       return services_;
 631     }
 632
 633     mojo::ServiceProviderPtr& exposed_services() { return exposed_services_; }
 634
 635    private:
 636     friend class base::RefCounted<PendingRenderFrameConnect>;
 637
 638     ~PendingRenderFrameConnect() override;
 639
 640     void OnConnectionError() override;
 641
 642     int routing_id_;
 643     mojo::InterfaceRequest<mojo::ServiceProvider> services_;
 644     mojo::ServiceProviderPtr exposed_services_;
 645   };
 646
 647   typedef std::map<int, scoped_refptr<PendingRenderFrameConnect>>
 648       PendingRenderFrameConnectMap;
 649   PendingRenderFrameConnectMap pending_render_frame_connects_;
 650
 651   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 652 };
 653
 654 #if defined(COMPILER_MSVC)
 655 #pragma warning(pop)
 656 #endif
 657
 658 }  // namespace content
 659
 660 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_