Rename HTMLMediaElement::createMediaControls to ensureMediaControls

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 422 matching lines @@
     bool potentiallyPlaying() const;
     bool endedPlayback() const;
     bool stoppedDueToErrors() const;
     bool couldPlayIfEnoughData() const;
 
     void setShouldDelayLoadEvent(bool);
     void invalidateCachedTime();
     void refreshCachedTime() const;
 
     bool hasMediaControls() const;
-    bool createMediaControls();
+    void ensureMediaControls();
     void configureMediaControls();
 
     virtual void* preDispatchEventHandler(Event*) override final;
 
     void changeNetworkStateFromLoadingToIdle();
 
     const AtomicString& mediaGroup() const;
     void setMediaGroup(const AtomicString&);
     void updateMediaController();
     bool isBlocked() const;
@@ skipping 177 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