[scheduler] Teach scheduler about audio state

third_party/WebKit/public/web/WebView.h

 /*
  * Copyright (C) 2009, 2010, 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 341 matching lines @@
 
   // Performs the specified media player action on the node at the given
   // location.
   virtual void performMediaPlayerAction(const WebMediaPlayerAction&,
                                         const WebPoint& location) = 0;
 
   // Performs the specified plugin action on the node at the given location.
   virtual void performPluginAction(const WebPluginAction&,
                                    const WebPoint& location) = 0;
 
+  // Notifies WebView when audio is started or stopped.
+  virtual void audioStateChanged(bool isAudioPlaying) = 0;
+
   // Data exchange -------------------------------------------------------
 
   // Do a hit test at given point and return the HitTestResult.
   virtual WebHitTestResult hitTestResultAt(const WebPoint&) = 0;
 
   // Do a hit test equivalent to what would be done for a GestureTap event
   // that has width/height corresponding to the supplied |tapArea|.
   virtual WebHitTestResult hitTestResultForTap(const WebPoint& tapPoint,
                                                const WebSize& tapArea) = 0;
 
@@ skipping 159 matching lines @@
   // completed.
   WebWidget* widget() { return this; }
 
  protected:
   ~WebView() {}
 };
 
 }  // namespace blink
 
 #endif