Schedule idle handler in the foreground tab based on CPU usage and user activity.

content/renderer/render_thread_impl.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 25 matching lines @@
 class SkBitmap;
 class VideoCaptureImplManager;
 struct ViewMsg_New_Params;
 class WebDatabaseObserverImpl;
 
 namespace WebKit {
 class WebStorageEventDispatcher;
 }
 
 namespace base {
+class ProcessMetrics;
 class MessageLoopProxy;
 class Thread;
 namespace win {
 class ScopedCOMInitializer;
 }
 }
 
 namespace content {
 class RenderProcessObserver;
 }
@@ skipping 50 matching lines @@
   virtual base::SharedMemoryHandle HostAllocateSharedMemoryBuffer(
       uint32 buffer_size) OVERRIDE;
   virtual void RegisterExtension(v8::Extension* extension) OVERRIDE;
   virtual bool IsRegisteredExtension(
       const std::string& v8_extension_name) const OVERRIDE;
   virtual void ScheduleIdleHandler(int64 initial_delay_ms) OVERRIDE;
   virtual void IdleHandler() OVERRIDE;
   virtual int64 GetIdleNotificationDelayInMs() const OVERRIDE;
   virtual void SetIdleNotificationDelayInMs(
       int64 idle_notification_delay_in_ms) OVERRIDE;
+  virtual void PostponeIdleNotification() OVERRIDE;
 #if defined(OS_WIN)
   virtual void PreCacheFont(const LOGFONT& log_font) OVERRIDE;
   virtual void ReleaseCachedFonts() OVERRIDE;
 #endif
 
   // These methods modify how the next message is sent.  Normally, when sending
   // a synchronous message that runs a nested message loop, we need to suspend
   // callbacks into WebKit.  This involves disabling timers and deferring
   // resource loads.  However, there are exceptions when we need to customize
   // the behavior.
@@ skipping 51 matching lines @@
   void OnDOMStorageEvent(const DOMStorageMsg_Event_Params& params);
   void OnSetNextPageID(int32 next_page_id);
   void OnSetCSSColors(const std::vector<CSSColors::CSSColorMapping>& colors);
   void OnCreateNewView(const ViewMsg_New_Params& params);
   void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
   void OnPurgePluginListCache(bool reload_pages);
   void OnNetworkStateChanged(bool online);
   void OnGetAccessibilityTree();
   void OnTempCrashWithData(const GURL& data);
 
+  void IdleHandlerInForegroundTab();
+
   // These objects live solely on the render thread.
   scoped_ptr<ScopedRunnableMethodFactory<RenderThreadImpl> > task_factory_;
   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
   scoped_ptr<IndexedDBDispatcher> indexed_db_dispatcher_;
   scoped_ptr<RendererWebKitPlatformSupportImpl> webkit_platform_support_;
   scoped_ptr<WebKit::WebStorageEventDispatcher> dom_storage_event_dispatcher_;
 
   // Used on the renderer and IPC threads.
   scoped_refptr<DBMessageFilter> db_message_filter_;
   scoped_refptr<AudioInputMessageFilter> audio_input_message_filter_;
@@ skipping 14 matching lines @@
 
   // The count of RenderWidgets running through this thread.
   int widget_count_;
 
   // The count of hidden RenderWidgets running through this thread.
   int hidden_widget_count_;
 
   // The current value of the idle notification timer delay.
   int64 idle_notification_delay_in_ms_;
 
+  // The number of idle handler calls that skip sending idle notifications.
+  int idle_notifications_to_skip_;
+
   bool suspend_webkit_shared_timer_;
   bool notify_webkit_of_modal_loop_;
 
   // Timer that periodically calls IdleHandler.
   base::RepeatingTimer<RenderThreadImpl> idle_timer_;
 
+  scoped_ptr<base::ProcessMetrics> process_metrics_;
+
   // The channel from the renderer process to the GPU process.
   scoped_refptr<GpuChannelHost> gpu_channel_;
 
   // A lazily initiated thread on which file operations are run.
   scoped_ptr<base::Thread> file_thread_;
 
   // Map of registered v8 extensions. The key is the extension name.
   std::set<std::string> v8_extensions_;
 
   scoped_ptr<CompositorThread> compositor_thread_;
 
   ObserverList<content::RenderProcessObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_