[scheduler] Teach scheduler about audio state

third_party/WebKit/public/web/WebLocalFrame.h

 // Copyright 2014 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 WebLocalFrame_h
 #define WebLocalFrame_h
 
 #include "WebCompositionUnderline.h"
 #include "WebFrame.h"
 #include "WebFrameLoadType.h"
@@ skipping 415 matching lines @@
   virtual void copyImageAt(const WebPoint&) = 0;
 
   // Save as the image located at a particular point in visual viewport
   // coordinates.
   virtual void saveImageAt(const WebPoint&) = 0;
 
   // TEMP: Usage count for chrome.loadtimes deprecation.
   // This will be removed following the deprecation.
   virtual void usageCountChromeLoadTimes(const WebString& metric) = 0;
 
+  // Audio --------------------------------------------------------------------
+
+  // Notifies WebFrame when audio is started or stopped.
+  virtual void audioStateChanged(bool isAudioPlaying) = 0;
+
  protected:
   explicit WebLocalFrame(WebTreeScopeType scope) : WebFrame(scope) {}
 
   // Inherited from WebFrame, but intentionally hidden: it never makes sense
   // to call these on a WebLocalFrame.
   bool isWebLocalFrame() const override = 0;
   WebLocalFrame* toWebLocalFrame() override = 0;
   bool isWebRemoteFrame() const override = 0;
   WebRemoteFrame* toWebRemoteFrame() override = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebLocalFrame_h