Update remaining HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/shadow/MediaControlElements.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 185 matching lines @@
 };
 
 // ----------------------------
 
 class MediaControlFullscreenButtonElement FINAL : public MediaControlInputElement {
 public:
     static PassRefPtr<MediaControlFullscreenButtonElement> create(Document&);
 
     virtual bool willRespondToMouseClickEvents() OVERRIDE { return true; }
 
-    virtual void setIsFullscreen(bool);
+    void setIsFullscreen(bool);
 
 private:
     explicit MediaControlFullscreenButtonElement(Document&);
 
     virtual const AtomicString& shadowPseudoId() const OVERRIDE;
     virtual void defaultEventHandler(Event*) OVERRIDE;
 };
 
 // ----------------------------
 
@@ skipping 35 matching lines @@
     static PassRefPtr<MediaControlTextTrackContainerElement> create(Document&);
 
     void updateDisplay();
     void updateSizes(bool forceUpdate = false);
     static const AtomicString& textTrackContainerElementShadowPseudoId();
 
 private:
     explicit MediaControlTextTrackContainerElement(Document&);
     virtual const AtomicString& shadowPseudoId() const OVERRIDE;
 
-    virtual RenderObject* createRenderer(RenderStyle*);
+    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
     IntRect m_videoDisplaySize;
     float m_fontSize;
 };
 
 
 } // namespace WebCore
 
 #endif // MediaControlElements_h