[scheduler] Teach scheduler about audio state

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 210 matching lines @@
   void setZoomFactorForDeviceScaleFactor(float) override;
 
   void setDeviceColorProfile(const WebVector<char>&) override;
 
   void enableAutoResizeMode(const WebSize& minSize,
                             const WebSize& maxSize) override;
   void disableAutoResizeMode() override;
   void performMediaPlayerAction(const WebMediaPlayerAction& action,
                                 const WebPoint& location) override;
   void performPluginAction(const WebPluginAction&, const WebPoint&) override;
+  void audioStateChanged(bool isAudioPlaying) override;
   WebHitTestResult hitTestResultAt(const WebPoint&) override;
   WebHitTestResult hitTestResultForTap(const WebPoint&,
                                        const WebSize&) override;
   void dragSourceEndedAt(const WebPoint& clientPoint,
                          const WebPoint& screenPoint,
                          WebDragOperation) override;
   void dragSourceSystemDragEnded() override;
   WebDragOperation dragTargetDragEnter(const WebDragData&,
                                        const WebPoint& clientPoint,
                                        const WebPoint& screenPoint,
@@ skipping 536 matching lines @@
   Persistent<ResizeViewportAnchor> m_resizeViewportAnchor;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 }  // namespace blink
 
 #endif