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 class TaskGraphRunner;
  58 }
  59
  60 namespace cc_blink {
  61 class ContextProviderWebContext;
  62 }
  63
  64 namespace IPC {
  65 class MessageFilter;
  66 }
  67
  68 namespace media {
  69 class AudioHardwareConfig;
  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 CacheStorageDispatcher;
  86 class CompositorForwardingMessageFilter;
  87 class ContextProviderCommandBuffer;
  88 class DBMessageFilter;
  89 class DevToolsAgentFilter;
  90 class DomStorageDispatcher;
  91 class EmbeddedWorkerDispatcher;
  92 class GpuChannelHost;
  93 class IndexedDBDispatcher;
  94 class InputHandlerManager;
  95 class MediaStreamCenter;
  96 class MemoryObserver;
  97 class MidiMessageFilter;
  98 class NetInfoDispatcher;
  99 class P2PSocketDispatcher;
 100 class PeerConnectionDependencyFactory;
 101 class PeerConnectionTracker;
 102 class RenderProcessObserver;
 103 class RendererBlinkPlatformImpl;
 104 class RendererDemuxerAndroid;
 105 class RendererScheduler;
 106 class ResourceDispatchThrottler;
 107 class ResourceSchedulingFilter;
 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   int GetGpuRasterizationMSAASampleCount() override;
 188   bool IsLcdTextEnabled() override;
 189   bool IsDistanceFieldTextEnabled() override;
 190   bool IsZeroCopyEnabled() override;
 191   bool IsOneCopyEnabled() override;
 192   bool IsElasticOverscrollEnabled() override;
 193   bool UseSingleThreadScheduler() override;
 194   uint32 GetImageTextureTarget() override;
 195   scoped_refptr<base::SingleThreadTaskRunner>
 196   GetCompositorMainThreadTaskRunner() override;
 197   scoped_refptr<base::SingleThreadTaskRunner>
 198   GetCompositorImplThreadTaskRunner() override;
 199   gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
 200   RendererScheduler* GetRendererScheduler() override;
 201   cc::ContextProvider* GetSharedMainThreadContextProvider() override;
 202   scoped_ptr<cc::BeginFrameSource> CreateExternalBeginFrameSource(
 203       int routing_id) override;
 204   cc::TaskGraphRunner* GetTaskGraphRunner() override;
 205   bool IsGatherPixelRefsEnabled() 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   // Note: A widget must not be hidden when it is destroyed - ensure that
 405   // WidgetRestored is called before WidgetDestroyed for any hidden widget.
 406   void WidgetDestroyed();
 407   void WidgetHidden();
 408   void WidgetRestored();
 409
 410   void AddEmbeddedWorkerRoute(int32 routing_id, IPC::Listener* listener);
 411   void RemoveEmbeddedWorkerRoute(int32 routing_id);
 412
 413   void RegisterPendingRenderFrameConnect(
 414       int routing_id,
 415       mojo::InterfaceRequest<mojo::ServiceProvider> services,
 416       mojo::ServiceProviderPtr exposed_services);
 417
 418  protected:
 419   virtual void SetResourceDispatchTaskQueue(
 420     const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
 421
 422  private:
 423   // ChildThread
 424   bool OnControlMessageReceived(const IPC::Message& msg) override;
 425
 426   // GpuChannelHostFactory implementation:
 427   bool IsMainThread() override;
 428   base::MessageLoop* GetMainLoop() override;
 429   scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() override;
 430   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t size) override;
 431   CreateCommandBufferResult CreateViewCommandBuffer(
 432       int32 surface_id,
 433       const GPUCreateCommandBufferConfig& init_params,
 434       int32 route_id) override;
 435
 436   void Init();
 437
 438   void OnCreateNewFrame(int routing_id,
 439                         int parent_routing_id,
 440                         int proxy_routing_id,
 441                         const FrameReplicationState& replicated_state,
 442                         FrameMsg_NewFrame_WidgetParams params);
 443   void OnCreateNewFrameProxy(int routing_id,
 444                              int parent_routing_id,
 445                              int render_view_routing_id,
 446                              const FrameReplicationState& replicated_state);
 447   void OnSetZoomLevelForCurrentURL(const std::string& scheme,
 448                                    const std::string& host,
 449                                    double zoom_level);
 450   void OnCreateNewView(const ViewMsg_New_Params& params);
 451   void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
 452 #if defined(ENABLE_PLUGINS)
 453   void OnPurgePluginListCache(bool reload_pages);
 454 #endif
 455   void OnNetworkTypeChanged(net::NetworkChangeNotifier::ConnectionType type);
 456   void OnGetAccessibilityTree();
 457   void OnTempCrashWithData(const GURL& data);
 458   void OnUpdateTimezone();
 459   void OnMemoryPressure(
 460       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
 461 #if defined(OS_ANDROID)
 462   void OnSetWebKitSharedTimersSuspended(bool suspend);
 463 #endif
 464 #if defined(OS_MACOSX)
 465   void OnUpdateScrollbarTheme(float initial_button_delay,
 466                               float autoscroll_button_delay,
 467                               bool jump_on_track_click,
 468                               blink::ScrollerStyle preferred_scroller_style,
 469                               bool redraw);
 470 #endif
 471   void OnCreateNewSharedWorker(
 472       const WorkerProcessMsg_CreateWorker_Params& params);
 473   bool RendererIsHidden() const;
 474   void OnRendererHidden();
 475   void OnRendererVisible();
 476
 477   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext3d();
 478
 479   // These objects live solely on the render thread.
 480   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
 481   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
 482   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
 483   scoped_ptr<RendererScheduler> renderer_scheduler_;
 484   scoped_ptr<RendererBlinkPlatformImpl> blink_platform_impl_;
 485   scoped_ptr<ResourceDispatchThrottler> resource_dispatch_throttler_;
 486   scoped_ptr<CacheStorageDispatcher> main_thread_cache_storage_dispatcher_;
 487   scoped_ptr<EmbeddedWorkerDispatcher> embedded_worker_dispatcher_;
 488
 489   // Used on the render thread and deleted by WebKit at shutdown.
 490   blink::WebMediaStreamCenter* media_stream_center_;
 491
 492   // Used on the renderer and IPC threads.
 493   scoped_refptr<DBMessageFilter> db_message_filter_;
 494   scoped_refptr<AudioInputMessageFilter> audio_input_message_filter_;
 495   scoped_refptr<AudioMessageFilter> audio_message_filter_;
 496   scoped_refptr<MidiMessageFilter> midi_message_filter_;
 497 #if defined(OS_ANDROID)
 498   scoped_refptr<RendererDemuxerAndroid> renderer_demuxer_;
 499 #endif
 500   scoped_refptr<DevToolsAgentFilter> devtools_agent_message_filter_;
 501   scoped_ptr<V8SamplingProfiler> v8_sampling_profiler_;
 502
 503   scoped_ptr<BrowserPluginManager> browser_plugin_manager_;
 504
 505 #if defined(ENABLE_WEBRTC)
 506   scoped_ptr<PeerConnectionDependencyFactory> peer_connection_factory_;
 507
 508   // This is used to communicate to the browser process the status
 509   // of all the peer connections created in the renderer.
 510   scoped_ptr<PeerConnectionTracker> peer_connection_tracker_;
 511
 512   // Dispatches all P2P sockets.
 513   scoped_refptr<P2PSocketDispatcher> p2p_socket_dispatcher_;
 514 #endif
 515
 516   // Used on the render thread.
 517   scoped_ptr<VideoCaptureImplManager> vc_manager_;
 518
 519   // Used for communicating registering AEC dump consumers with the browser and
 520   // receving AEC dump file handles when AEC dump is enabled. An AEC dump is
 521   // diagnostic audio data for WebRTC stored locally when enabled by the user in
 522   // chrome://webrtc-internals.
 523   scoped_refptr<AecDumpMessageFilter> aec_dump_message_filter_;
 524
 525   // The count of RenderWidgets running through this thread.
 526   int widget_count_;
 527
 528   // The count of hidden RenderWidgets running through this thread.
 529   int hidden_widget_count_;
 530
 531   // The current value of the idle notification timer delay.
 532   int64 idle_notification_delay_in_ms_;
 533
 534   // The number of idle handler calls that skip sending idle notifications.
 535   int idle_notifications_to_skip_;
 536
 537   bool suspend_webkit_shared_timer_;
 538   bool notify_webkit_of_modal_loop_;
 539   bool webkit_shared_timer_suspended_;
 540
 541   // The following flag is used to control layout test specific behavior.
 542   bool layout_test_mode_;
 543
 544   // Timer that periodically calls IdleHandler.
 545   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 546
 547   // The channel from the renderer process to the GPU process.
 548   scoped_refptr<GpuChannelHost> gpu_channel_;
 549
 550   // Cache of variables that are needed on the compositor thread by
 551   // GpuChannelHostFactory methods.
 552   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 553
 554   // The message loop of the renderer main thread.
 555   // This message loop should be destructed before the RenderThreadImpl
 556   // shuts down Blink.
 557   scoped_ptr<base::MessageLoop> main_message_loop_;
 558
 559   // A lazily initiated thread on which file operations are run.
 560   scoped_ptr<base::Thread> file_thread_;
 561
 562   // May be null if overridden by ContentRendererClient.
 563   scoped_ptr<base::Thread> compositor_thread_;
 564
 565   // Thread for running multimedia operations (e.g., video decoding).
 566   scoped_ptr<base::Thread> media_thread_;
 567
 568   // Will point to appropriate MessageLoopProxy after initialization,
 569   // regardless of whether |compositor_thread_| is overriden.
 570   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy_;
 571
 572   // Threads used by compositor for rasterization.
 573   ScopedVector<base::SimpleThread> compositor_raster_threads_;
 574
 575   base::CancelableCallback<void(const IPC::Message&)> main_input_callback_;
 576   scoped_refptr<IPC::MessageFilter> input_event_filter_;
 577   scoped_ptr<InputHandlerManager> input_handler_manager_;
 578   scoped_refptr<CompositorForwardingMessageFilter> compositor_message_filter_;
 579
 580   scoped_refptr<cc_blink::ContextProviderWebContext>
 581       shared_main_thread_contexts_;
 582
 583   ObserverList<RenderProcessObserver> observers_;
 584
 585   scoped_refptr<ContextProviderCommandBuffer> gpu_va_context_provider_;
 586
 587   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
 588   scoped_ptr<media::AudioHardwareConfig> audio_hardware_config_;
 589
 590   HistogramCustomizer histogram_customizer_;
 591
 592   scoped_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 593
 594 #if defined(ENABLE_WEBRTC)
 595   scoped_ptr<WebRTCIdentityService> webrtc_identity_service_;
 596 #endif
 597
 598   scoped_ptr<MemoryObserver> memory_observer_;
 599
 600   scoped_refptr<base::SingleThreadTaskRunner>
 601       main_thread_compositor_task_runner_;
 602
 603   scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter_;
 604
 605   scoped_ptr<cc::TaskGraphRunner> compositor_task_graph_runner_;
 606
 607   // Compositor settings.
 608   bool is_gpu_rasterization_enabled_;
 609   bool is_gpu_rasterization_forced_;
 610   int gpu_rasterization_msaa_sample_count_;
 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_