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 ResourceDispatchThrottler;
 105 class ResourceSchedulingFilter;
 106 class V8SamplingProfiler;
 107 class VideoCaptureImplManager;
 108 class WebGraphicsContext3DCommandBufferImpl;
 109 class WebRTCIdentityService;
 110
 111 #if defined(COMPILER_MSVC)
 112 // See explanation for other RenderViewHostImpl which is the same issue.
 113 #pragma warning(push)
 114 #pragma warning(disable: 4250)
 115 #endif
 116
 117 // The RenderThreadImpl class represents a background thread where RenderView
 118 // instances live.  The RenderThread supports an API that is used by its
 119 // consumer to talk indirectly to the RenderViews and supporting objects.
 120 // Likewise, it provides an API for the RenderViews to talk back to the main
 121 // process (i.e., their corresponding WebContentsImpl).
 122 //
 123 // Most of the communication occurs in the form of IPC messages.  They are
 124 // routed to the RenderThread according to the routing IDs of the messages.
 125 // The routing IDs correspond to RenderView instances.
 126 class CONTENT_EXPORT RenderThreadImpl
 127     : public RenderThread,
 128       public ChildThreadImpl,
 129       public GpuChannelHostFactory,
 130       NON_EXPORTED_BASE(public CompositorDependencies) {
 131  public:
 132   static RenderThreadImpl* current();
 133
 134   RenderThreadImpl();
 135   // Constructor that's used when running in single process mode.
 136   explicit RenderThreadImpl(const std::string& channel_name);
 137   // Constructor that's used in RendererMain.
 138   explicit RenderThreadImpl(scoped_ptr<base::MessageLoop> main_message_loop);
 139   ~RenderThreadImpl() override;
 140   void Shutdown() override;
 141
 142   // When initializing WebKit, ensure that any schemes needed for the content
 143   // module are registered properly.  Static to allow sharing with tests.
 144   static void RegisterSchemes();
 145
 146   // Notify V8 that the date/time configuration of the system might have
 147   // changed.
 148   static void NotifyTimezoneChange();
 149
 150   // RenderThread implementation:
 151   bool Send(IPC::Message* msg) override;
 152   scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() override;
 153   IPC::SyncChannel* GetChannel() override;
 154   std::string GetLocale() override;
 155   IPC::SyncMessageFilter* GetSyncMessageFilter() override;
 156   scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() override;
 157   void AddRoute(int32 routing_id, IPC::Listener* listener) override;
 158   void RemoveRoute(int32 routing_id) override;
 159   int GenerateRoutingID() override;
 160   void AddFilter(IPC::MessageFilter* filter) override;
 161   void RemoveFilter(IPC::MessageFilter* filter) override;
 162   void AddObserver(RenderProcessObserver* observer) override;
 163   void RemoveObserver(RenderProcessObserver* observer) override;
 164   void SetResourceDispatcherDelegate(
 165       ResourceDispatcherDelegate* delegate) override;
 166   void EnsureWebKitInitialized() override;
 167   void RecordAction(const base::UserMetricsAction& action) override;
 168   void RecordComputedAction(const std::string& action) override;
 169   scoped_ptr<base::SharedMemory> HostAllocateSharedMemoryBuffer(
 170       size_t buffer_size) override;
 171   cc::SharedBitmapManager* GetSharedBitmapManager() override;
 172   void RegisterExtension(v8::Extension* extension) override;
 173   void ScheduleIdleHandler(int64 initial_delay_ms) override;
 174   void IdleHandler() override;
 175   int64 GetIdleNotificationDelayInMs() const override;
 176   void SetIdleNotificationDelayInMs(
 177       int64 idle_notification_delay_in_ms) override;
 178   void UpdateHistograms(int sequence_number) override;
 179   int PostTaskToAllWebWorkers(const base::Closure& closure) override;
 180   bool ResolveProxy(const GURL& url, std::string* proxy_list) override;
 181   base::WaitableEvent* GetShutdownEvent() override;
 182   ServiceRegistry* GetServiceRegistry() override;
 183
 184   // CompositorDependencies implementation.
 185   bool IsImplSidePaintingEnabled() override;
 186   bool IsGpuRasterizationForced() override;
 187   bool IsGpuRasterizationEnabled() override;
 188   bool IsThreadedGpuRasterizationEnabled() override;
 189   int GetGpuRasterizationMSAASampleCount() override;
 190   bool IsLcdTextEnabled() override;
 191   bool IsDistanceFieldTextEnabled() override;
 192   bool IsZeroCopyEnabled() override;
 193   bool IsOneCopyEnabled() override;
 194   bool IsElasticOverscrollEnabled() override;
 195   bool UseSingleThreadScheduler() override;
 196   uint32 GetImageTextureTarget() override;
 197   scoped_refptr<base::SingleThreadTaskRunner>
 198   GetCompositorMainThreadTaskRunner() override;
 199   scoped_refptr<base::SingleThreadTaskRunner>
 200   GetCompositorImplThreadTaskRunner() override;
 201   gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
 202   RendererScheduler* GetRendererScheduler() override;
 203   cc::ContextProvider* GetSharedMainThreadContextProvider() override;
 204   scoped_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
 205       int routing_id) override;
 206
 207   // Synchronously establish a channel to the GPU plugin if not previously
 208   // established or if it has been lost (for example if the GPU plugin crashed).
 209   // If there is a pending asynchronous request, it will be completed by the
 210   // time this routine returns.
 211   GpuChannelHost* EstablishGpuChannelSync(CauseForGpuLaunch);
 212
 213
 214   // These methods modify how the next message is sent.  Normally, when sending
 215   // a synchronous message that runs a nested message loop, we need to suspend
 216   // callbacks into WebKit.  This involves disabling timers and deferring
 217   // resource loads.  However, there are exceptions when we need to customize
 218   // the behavior.
 219   void DoNotSuspendWebKitSharedTimer();
 220   void DoNotNotifyWebKitOfModalLoop();
 221
 222   // True if we are running layout tests. This currently disables forwarding
 223   // various status messages to the console, skips network error pages, and
 224   // short circuits size update and focus events.
 225   bool layout_test_mode() const {
 226     return layout_test_mode_;
 227   }
 228   void set_layout_test_mode(bool layout_test_mode) {
 229     layout_test_mode_ = layout_test_mode;
 230   }
 231
 232   RendererBlinkPlatformImpl* blink_platform_impl() const {
 233     DCHECK(blink_platform_impl_);
 234     return blink_platform_impl_.get();
 235   }
 236
 237   CompositorForwardingMessageFilter* compositor_message_filter() const {
 238     return compositor_message_filter_.get();
 239   }
 240
 241   InputHandlerManager* input_handler_manager() const {
 242     return input_handler_manager_.get();
 243   }
 244
 245   // Will be null if threaded compositing has not been enabled.
 246   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy() const {
 247     return compositor_message_loop_proxy_;
 248   }
 249
 250   AppCacheDispatcher* appcache_dispatcher() const {
 251     return appcache_dispatcher_.get();
 252   }
 253
 254   DomStorageDispatcher* dom_storage_dispatcher() const {
 255     return dom_storage_dispatcher_.get();
 256   }
 257
 258   EmbeddedWorkerDispatcher* embedded_worker_dispatcher() const {
 259     return embedded_worker_dispatcher_.get();
 260   }
 261
 262   AudioInputMessageFilter* audio_input_message_filter() {
 263     return audio_input_message_filter_.get();
 264   }
 265
 266   AudioMessageFilter* audio_message_filter() {
 267     return audio_message_filter_.get();
 268   }
 269
 270   MidiMessageFilter* midi_message_filter() {
 271     return midi_message_filter_.get();
 272   }
 273
 274 #if defined(OS_ANDROID)
 275   RendererDemuxerAndroid* renderer_demuxer() {
 276     return renderer_demuxer_.get();
 277   }
 278 #endif
 279
 280   // Creates the embedder implementation of WebMediaStreamCenter.
 281   // The resulting object is owned by WebKit and deleted by WebKit at tear-down.
 282   blink::WebMediaStreamCenter* CreateMediaStreamCenter(
 283       blink::WebMediaStreamCenterClient* client);
 284
 285   BrowserPluginManager* browser_plugin_manager() const {
 286     return browser_plugin_manager_.get();
 287   }
 288
 289 #if defined(ENABLE_WEBRTC)
 290   // Returns a factory used for creating RTC PeerConnection objects.
 291   PeerConnectionDependencyFactory* GetPeerConnectionDependencyFactory();
 292
 293   PeerConnectionTracker* peer_connection_tracker() {
 294     return peer_connection_tracker_.get();
 295   }
 296
 297   // Current P2PSocketDispatcher. Set to NULL if P2P API is disabled.
 298   P2PSocketDispatcher* p2p_socket_dispatcher() {
 299     return p2p_socket_dispatcher_.get();
 300   }
 301 #endif
 302
 303   VideoCaptureImplManager* video_capture_impl_manager() const {
 304     return vc_manager_.get();
 305   }
 306
 307   // Get the GPU channel. Returns NULL if the channel is not established or
 308   // has been lost.
 309   GpuChannelHost* GetGpuChannel();
 310
 311   // Returns a MessageLoopProxy instance corresponding to the message loop
 312   // of the thread on which file operations should be run. Must be called
 313   // on the renderer's main thread.
 314   scoped_refptr<base::MessageLoopProxy> GetFileThreadMessageLoopProxy();
 315
 316   // Returns a SingleThreadTaskRunner instance corresponding to the message loop
 317   // of the thread on which media operations should be run. Must be called
 318   // on the renderer's main thread.
 319   scoped_refptr<base::SingleThreadTaskRunner> GetMediaThreadTaskRunner();
 320
 321   // Causes the idle handler to skip sending idle notifications
 322   // on the two next scheduled calls, so idle notifications are
 323   // not sent for at least one notification delay.
 324   void PostponeIdleNotification();
 325
 326   scoped_refptr<media::GpuVideoAcceleratorFactories> GetGpuFactories();
 327
 328   scoped_refptr<cc_blink::ContextProviderWebContext>
 329   SharedMainThreadContextProvider();
 330
 331   // AudioRendererMixerManager instance which manages renderer side mixer
 332   // instances shared based on configured audio parameters.  Lazily created on
 333   // first call.
 334   AudioRendererMixerManager* GetAudioRendererMixerManager();
 335
 336   // AudioHardwareConfig contains audio hardware configuration for
 337   // renderer side clients.  Creation requires a synchronous IPC call so it is
 338   // lazily created on the first call.
 339   media::AudioHardwareConfig* GetAudioHardwareConfig();
 340
 341 #if defined(OS_WIN)
 342   void PreCacheFontCharacters(const LOGFONT& log_font,
 343                               const base::string16& str);
 344 #endif
 345
 346 #if defined(ENABLE_WEBRTC)
 347   WebRTCIdentityService* get_webrtc_identity_service() {
 348     return webrtc_identity_service_.get();
 349   }
 350 #endif
 351
 352   // For producing custom V8 histograms. Custom histograms are produced if all
 353   // RenderViews share the same host, and the host is in the pre-specified set
 354   // of hosts we want to produce custom diagrams for. The name for a custom
 355   // diagram is the name of the corresponding generic diagram plus a
 356   // host-specific suffix.
 357   class CONTENT_EXPORT HistogramCustomizer {
 358    public:
 359     HistogramCustomizer();
 360     ~HistogramCustomizer();
 361
 362     // Called when a top frame of a RenderView navigates. This function updates
 363     // RenderThreadImpl's information about whether all RenderViews are
 364     // displaying a page from the same host. |host| is the host where a
 365     // RenderView navigated, and |view_count| is the number of RenderViews in
 366     // this process.
 367     void RenderViewNavigatedToHost(const std::string& host, size_t view_count);
 368
 369     // Used for customizing some histograms if all RenderViews share the same
 370     // host. Returns the current custom histogram name to use for
 371     // |histogram_name|, or |histogram_name| if it shouldn't be customized.
 372     std::string ConvertToCustomHistogramName(const char* histogram_name) const;
 373
 374    private:
 375     friend class RenderThreadImplUnittest;
 376
 377     // Used for updating the information on which is the common host which all
 378     // RenderView's share (if any). If there is no common host, this function is
 379     // called with an empty string.
 380     void SetCommonHost(const std::string& host);
 381
 382     // The current common host of the RenderViews; empty string if there is no
 383     // common host.
 384     std::string common_host_;
 385     // The corresponding suffix.
 386     std::string common_host_histogram_suffix_;
 387     // Set of histograms for which we want to produce a custom histogram if
 388     // possible.
 389     std::set<std::string> custom_histograms_;
 390
 391     DISALLOW_COPY_AND_ASSIGN(HistogramCustomizer);
 392   };
 393
 394   HistogramCustomizer* histogram_customizer() {
 395     return &histogram_customizer_;
 396   }
 397
 398   // Retrieve current gamepad data.
 399   void SampleGamepads(blink::WebGamepads* data);
 400
 401   // Called by a RenderWidget when it is created or destroyed. This
 402   // allows the process to know when there are no visible widgets.
 403   void WidgetCreated();
 404   void WidgetDestroyed();
 405   void WidgetHidden();
 406   void WidgetRestored();
 407
 408   void AddEmbeddedWorkerRoute(int32 routing_id, IPC::Listener* listener);
 409   void RemoveEmbeddedWorkerRoute(int32 routing_id);
 410
 411   void RegisterPendingRenderFrameConnect(
 412       int routing_id,
 413       mojo::InterfaceRequest<mojo::ServiceProvider> services,
 414       mojo::ServiceProviderPtr exposed_services);
 415
 416  protected:
 417   virtual void SetResourceDispatchTaskQueue(
 418     const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
 419
 420  private:
 421   // ChildThread
 422   bool OnControlMessageReceived(const IPC::Message& msg) override;
 423
 424   // GpuChannelHostFactory implementation:
 425   bool IsMainThread() override;
 426   base::MessageLoop* GetMainLoop() override;
 427   scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
 428   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
 429   CreateCommandBufferResult CreateViewCommandBuffer(
 430       int32 surface_id,
 431       const GPUCreateCommandBufferConfig& init_params,
 432       int32 route_id) override;
 433
 434   void Init();
 435
 436   void OnCreateNewFrame(int routing_id,
 437                         int parent_routing_id,
 438                         int proxy_routing_id,
 439                         const FrameReplicationState& replicated_state,
 440                         FrameMsg_NewFrame_WidgetParams params);
 441   void OnCreateNewFrameProxy(int routing_id,
 442                              int parent_routing_id,
 443                              int render_view_routing_id,
 444                              const FrameReplicationState& replicated_state);
 445   void OnSetZoomLevelForCurrentURL(const std::string& scheme,
 446                                    const std::string& host,
 447                                    double zoom_level);
 448   void OnCreateNewView(const ViewMsg_New_Params& params);
 449   void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
 450 #if defined(ENABLE_PLUGINS)
 451   void OnPurgePluginListCache(bool reload_pages);
 452 #endif
 453   void OnNetworkTypeChanged(net::NetworkChangeNotifier::ConnectionType type);
 454   void OnGetAccessibilityTree();
 455   void OnTempCrashWithData(const GURL& data);
 456   void OnUpdateTimezone();
 457   void OnMemoryPressure(
 458       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
 459 #if defined(OS_ANDROID)
 460   void OnSetWebKitSharedTimersSuspended(bool suspend);
 461 #endif
 462 #if defined(OS_MACOSX)
 463   void OnUpdateScrollbarTheme(float initial_button_delay,
 464                               float autoscroll_button_delay,
 465                               bool jump_on_track_click,
 466                               blink::ScrollerStyle preferred_scroller_style,
 467                               bool redraw);
 468 #endif
 469   void OnCreateNewSharedWorker(
 470       const WorkerProcessMsg_CreateWorker_Params& params);
 471
 472   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext3d();
 473
 474   // These objects live solely on the render thread.
 475   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
 476   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
 477   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
 478   scoped_ptr<RendererScheduler> renderer_scheduler_;
 479   scoped_ptr<RendererBlinkPlatformImpl> blink_platform_impl_;
 480   scoped_ptr<ResourceDispatchThrottler> resource_dispatch_throttler_;
 481   scoped_ptr<EmbeddedWorkerDispatcher> embedded_worker_dispatcher_;
 482
 483   // Used on the render thread and deleted by WebKit at shutdown.
 484   blink::WebMediaStreamCenter* media_stream_center_;
 485
 486   // Used on the renderer and IPC threads.
 487   scoped_refptr<DBMessageFilter> db_message_filter_;
 488   scoped_refptr<AudioInputMessageFilter> audio_input_message_filter_;
 489   scoped_refptr<AudioMessageFilter> audio_message_filter_;
 490   scoped_refptr<MidiMessageFilter> midi_message_filter_;
 491 #if defined(OS_ANDROID)
 492   scoped_refptr<RendererDemuxerAndroid> renderer_demuxer_;
 493 #endif
 494   scoped_refptr<DevToolsAgentFilter> devtools_agent_message_filter_;
 495   scoped_ptr<V8SamplingProfiler> v8_sampling_profiler_;
 496
 497   scoped_ptr<BrowserPluginManager> browser_plugin_manager_;
 498
 499 #if defined(ENABLE_WEBRTC)
 500   scoped_ptr<PeerConnectionDependencyFactory> peer_connection_factory_;
 501
 502   // This is used to communicate to the browser process the status
 503   // of all the peer connections created in the renderer.
 504   scoped_ptr<PeerConnectionTracker> peer_connection_tracker_;
 505
 506   // Dispatches all P2P sockets.
 507   scoped_refptr<P2PSocketDispatcher> p2p_socket_dispatcher_;
 508 #endif
 509
 510   // Used on the render thread.
 511   scoped_ptr<VideoCaptureImplManager> vc_manager_;
 512
 513   // Used for communicating registering AEC dump consumers with the browser and
 514   // receving AEC dump file handles when AEC dump is enabled. An AEC dump is
 515   // diagnostic audio data for WebRTC stored locally when enabled by the user in
 516   // chrome://webrtc-internals.
 517   scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_;
 518
 519   // The count of RenderWidgets running through this thread.
 520   int widget_count_;
 521
 522   // The count of hidden RenderWidgets running through this thread.
 523   int hidden_widget_count_;
 524
 525   // The current value of the idle notification timer delay.
 526   int64 idle_notification_delay_in_ms_;
 527
 528   // The number of idle handler calls that skip sending idle notifications.
 529   int idle_notifications_to_skip_;
 530
 531   bool suspend_webkit_shared_timer_;
 532   bool notify_webkit_of_modal_loop_;
 533   bool webkit_shared_timer_suspended_;
 534
 535   // The following flag is used to control layout test specific behavior.
 536   bool layout_test_mode_;
 537
 538   // Timer that periodically calls IdleHandler.
 539   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 540
 541   // The channel from the renderer process to the GPU process.
 542   scoped_refptr<GpuChannelHost> gpu_channel_;
 543
 544   // Cache of variables that are needed on the compositor thread by
 545   // GpuChannelHostFactory methods.
 546   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 547
 548   // The message loop of the renderer main thread.
 549   // This message loop should be destructed before the RenderThreadImpl
 550   // shuts down Blink.
 551   scoped_ptr<base::MessageLoop> main_message_loop_;
 552
 553   // A lazily initiated thread on which file operations are run.
 554   scoped_ptr<base::Thread> file_thread_;
 555
 556   // May be null if overridden by ContentRendererClient.
 557   scoped_ptr<base::Thread> compositor_thread_;
 558
 559   // Thread for running multimedia operations (e.g., video decoding).
 560   scoped_ptr<base::Thread> media_thread_;
 561
 562   // Will point to appropriate MessageLoopProxy after initialization,
 563   // regardless of whether |compositor_thread_| is overriden.
 564   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy_;
 565
 566   base::CancelableCallback<void(const IPC::Message&)> main_input_callback_;
 567   scoped_refptr<IPC::MessageFilter> input_event_filter_;
 568   scoped_ptr<InputHandlerManager> input_handler_manager_;
 569   scoped_refptr<CompositorForwardingMessageFilter> compositor_message_filter_;
 570
 571   scoped_refptr<cc_blink::ContextProviderWebContext>
 572       shared_main_thread_contexts_;
 573
 574   ObserverList<RenderProcessObserver> observers_;
 575
 576   scoped_refptr<ContextProviderCommandBuffer> gpu_va_context_provider_;
 577
 578   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
 579   scoped_ptr<media::AudioHardwareConfig> audio_hardware_config_;
 580
 581   HistogramCustomizer histogram_customizer_;
 582
 583   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 584
 585 #if defined(ENABLE_WEBRTC)
 586   scoped_ptr<WebRTCIdentityService> webrtc_identity_service_;
 587 #endif
 588
 589   scoped_ptr<MemoryObserver> memory_observer_;
 590
 591   scoped_refptr<base::SingleThreadTaskRunner>
 592       main_thread_compositor_task_runner_;
 593
 594   scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter_;
 595
 596   // Compositor settings.
 597   bool is_gpu_rasterization_enabled_;
 598   bool is_gpu_rasterization_forced_;
 599   int gpu_rasterization_msaa_sample_count_;
 600   bool is_threaded_gpu_rasterization_enabled_;
 601   bool is_impl_side_painting_enabled_;
 602   bool is_lcd_text_enabled_;
 603   bool is_distance_field_text_enabled_;
 604   bool is_zero_copy_enabled_;
 605   bool is_one_copy_enabled_;
 606   bool is_elastic_overscroll_enabled_;
 607   unsigned use_image_texture_target_;
 608
 609   struct PendingRenderFrameConnect
 610       : public base::RefCounted<PendingRenderFrameConnect> {
 611     PendingRenderFrameConnect(
 612         mojo::InterfaceRequest<mojo::ServiceProvider> services,
 613         mojo::ServiceProviderPtr exposed_services);
 614
 615     mojo::InterfaceRequest<mojo::ServiceProvider> services;
 616     mojo::ServiceProviderPtr exposed_services;
 617
 618    private:
 619     friend class base::RefCounted<PendingRenderFrameConnect>;
 620
 621     ~PendingRenderFrameConnect();
 622   };
 623
 624   typedef std::map<int, scoped_refptr<PendingRenderFrameConnect>>
 625       PendingRenderFrameConnectMap;
 626   PendingRenderFrameConnectMap pending_render_frame_connects_;
 627
 628   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 629 };
 630
 631 #if defined(COMPILER_MSVC)
 632 #pragma warning(pop)
 633 #endif
 634
 635 }  // namespace content
 636
 637 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_