Remove HTMLMediaElement::isPlaying()

Source/core/html/HTMLMediaElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 254 matching lines @@
 
     void remoteRouteAvailabilityChanged(bool);
     void connectedToRemoteDevice();
     void disconnectedFromRemoteDevice();
 
     MediaControls* mediaControls() const;
 
     void sourceWasRemoved(HTMLSourceElement*);
     void sourceWasAdded(HTMLSourceElement*);
 
-    bool isPlaying() const { return m_playing; }
-
     // ActiveDOMObject functions.
     virtual bool hasPendingActivity() const OVERRIDE FINAL;
     virtual void contextDestroyed() OVERRIDE FINAL;
 
 #if ENABLE(WEB_AUDIO)
     AudioSourceProviderClient* audioSourceNode() { return m_audioSourceNode; }
     void setAudioSourceNode(AudioSourceProviderClient*);
 
     AudioSourceProvider* audioSourceProvider();
 #endif
@@ skipping 351 matching lines @@
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } // namespace blink
 
 #endif // HTMLMediaElement_h