Remove MediaControlVolumeSliderElement::m_clearMutedOnUserInteraction

Source/core/html/shadow/MediaControlElementTypes.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 133 matching lines @@
     virtual void updateDisplayType() OVERRIDE;
 };
 
 // ----------------------------
 
 class MediaControlVolumeSliderElement : public MediaControlInputElement {
 public:
     virtual bool willRespondToMouseMoveEvents() OVERRIDE;
     virtual bool willRespondToMouseClickEvents() OVERRIDE;
     void setVolume(double);
-    void setClearMutedOnUserInteraction(bool);
 
 protected:
     explicit MediaControlVolumeSliderElement(Document&);
 
     virtual void defaultEventHandler(Event*) OVERRIDE;
-
-private:
-    bool m_clearMutedOnUserInteraction;
 };
 
 } // namespace WebCore
 
 #endif // MediaControlElementTypes_h