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 105 matching lines @@
 
   // Get the GPU channel. Returns NULL if the channel is not established or
   // has been lost.
   GpuChannelHost* GetGpuChannel();
 
   // Returns a MessageLoopProxy instance corresponding to the message loop
   // of the thread on which file operations should be run. Must be called
   // on the renderer's main thread.
   scoped_refptr<base::MessageLoopProxy> GetFileThreadMessageLoopProxy();
 
+  // Causes the idle handler to skip sending idle notifications
+  // on the two next scheduled calls, so idle notifications are
+  // not sent for at least one notification delay.
+  void PostponeIdleNotification();
+
  private:
   virtual bool OnControlMessageReceived(const IPC::Message& msg);
 
   void Init();
 
   void OnSetZoomLevelForCurrentURL(const GURL& url, double zoom_level);
   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_