Update remaining HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/shadow/MediaControls.h

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 77 matching lines @@
     virtual void stopHideFullscreenControlsTimer();
 
     virtual void createTextTrackDisplay();
     virtual void showTextTrackDisplay();
     virtual void hideTextTrackDisplay();
     virtual void updateTextTrackDisplay();
 
 protected:
     explicit MediaControls(Document&);
 
-    virtual void defaultEventHandler(Event*);
+    virtual void defaultEventHandler(Event*) OVERRIDE;
 
-    virtual bool containsRelatedTarget(Event*);
+    bool containsRelatedTarget(Event*);
 
     MediaControllerInterface* m_mediaController;
 
     // Container for the media control elements.
     MediaControlPanelElement* m_panel;
 
     // Container for the text track cues.
     MediaControlTextTrackContainerElement* m_textDisplayContainer;
 
     // Media control elements.
     MediaControlPlayButtonElement* m_playButton;
     MediaControlCurrentTimeDisplayElement* m_currentTimeDisplay;
     MediaControlTimelineElement* m_timeline;
     MediaControlPanelMuteButtonElement* m_panelMuteButton;
     MediaControlPanelVolumeSliderElement* m_volumeSlider;
     MediaControlToggleClosedCaptionsButtonElement* m_toggleClosedCaptionsButton;
     MediaControlFullscreenButtonElement* m_fullScreenButton;
 
     Timer<MediaControls> m_hideFullscreenControlsTimer;
     bool m_isFullscreen;
     bool m_isMouseOverControls;
 
 private:
-    virtual bool isMediaControls() const { return true; }
+    virtual bool isMediaControls() const OVERRIDE FINAL { return true; }
 
-    virtual const AtomicString& shadowPseudoId() const;
+    virtual const AtomicString& shadowPseudoId() const OVERRIDE;
 };
 
 DEFINE_NODE_TYPE_CASTS(MediaControls, isMediaControls());
 
 }
 
 #endif