Use AudioStreamMonitor to control power save blocking.

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 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_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 311 matching lines @@
   virtual int DownloadImage(const GURL& url,
                             bool is_favicon,
                             uint32_t max_bitmap_size,
                             const ImageDownloadCallback& callback) OVERRIDE;
   virtual bool IsSubframe() const OVERRIDE;
   virtual void Find(int request_id,
                     const base::string16& search_text,
                     const blink::WebFindOptions& options) OVERRIDE;
   virtual void StopFinding(StopFindAction action) OVERRIDE;
   virtual void InsertCSS(const std::string& css) OVERRIDE;
+  virtual bool WasRecentlyAudible() OVERRIDE;
 #if defined(OS_ANDROID)
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaWebContents()
       OVERRIDE;
   virtual WebContentsAndroid* GetWebContentsAndroid();
 #elif defined(OS_MACOSX)
   virtual void SetAllowOtherViews(bool allow) OVERRIDE;
   virtual bool GetAllowOtherViews() OVERRIDE;
 #endif
 
   // Implementation of PageNavigator.
@@ skipping 553 matching lines @@
 
   // TODO(creis): This should take in a FrameTreeNode to know which node's
   // render manager to return.  For now, we just return the root's.
   RenderFrameHostManager* GetRenderManager() const;
 
   RenderViewHostImpl* GetRenderViewHostImpl();
 
   // Removes browser plugin embedder if there is one.
   void RemoveBrowserPluginEmbedder();
 
-  // Clear |render_frame_host|'s PowerSaveBlockers.
+  // Clear |render_frame_host|'s tracking entry for |power_save_blocker_|.
   void ClearPowerSaveBlockers(RenderFrameHost* render_frame_host);
 
-  // Clear all PowerSaveBlockers, leave |power_save_blocker_| empty.
+  // Clear tracking entries for all RenderFrameHosts, clears
+  // |power_save_blocker_|.
   void ClearAllPowerSaveBlockers();
 
+  // Creates |power_save_blocker_|; must only be called if |power_save_blocker_|
+  // is NULL and |active_media_players_| is non-empty.
+  void CreatePowerSaveBlocker();
+
   // Helper function to invoke WebContentsDelegate::GetSizeForNewRenderView().
   gfx::Size GetSizeForNewRenderView();
 
   void OnFrameRemoved(RenderFrameHost* render_frame_host);
 
   // Helper method that's called whenever |preferred_size_| or
   // |preferred_size_for_capture_| changes, to propagate the new value to the
   // |delegate_|.
   void OnPreferredSizeChanged(const gfx::Size& old_size);
 
@@ skipping 45 matching lines @@
   // is closed.
   bool created_with_opener_;
 
 #if defined(OS_WIN)
   gfx::NativeViewAccessible accessible_parent_;
 #endif
 
   // Helper classes ------------------------------------------------------------
 
 #if !defined(OS_CHROMEOS)
-  // Maps the RenderFrameHost to its media_player_cookie and PowerSaveBlocker
-  // pairs. Key is the RenderFrameHost, value is the map which maps
-  // player_cookie on to PowerSaveBlocker.
-  //
-  // ChromeOS does its own detection of audio and video.
-  typedef base::ScopedPtrHashMap<int64, PowerSaveBlocker>
-      PowerSaveBlockerMapEntry;
-  typedef base::ScopedPtrHashMap<uintptr_t, PowerSaveBlockerMapEntry>
-      PowerSaveBlockerMap;
-  PowerSaveBlockerMap power_save_blockers_;
+  typedef std::map<uintptr_t, int> ActiveMediaPlayerMap;
+  ActiveMediaPlayerMap active_media_players_;
+  scoped_ptr<content::PowerSaveBlocker> power_save_blocker_;
 #endif
 
   // Manages the frame tree of the page and process swaps in each node.
   FrameTree frame_tree_;
 
   // SavePackage, lazily created.
   scoped_refptr<SavePackage> save_package_;
 
   // Data for loading state ----------------------------------------------------
 
@@ skipping 204 matching lines @@
   // The accessibility mode for all frames. This is queried when each frame
   // is created, and broadcast to all frames when it changes.
   AccessibilityMode accessibility_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_