Reduce virtual usage in MediaControlElementTypes

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 69 matching lines @@
 class MediaControlElement {
 public:
     virtual void hide();
     virtual void show();
     virtual bool isShowing() const;
 
     virtual MediaControlElementType displayType() { return m_displayType; }
     virtual const AtomicString& shadowPseudoId() const = 0;
 
     virtual void setMediaController(MediaControllerInterface* controller) { m_mediaController = controller; }
-    virtual MediaControllerInterface* mediaController() const { return m_mediaController; }
+    MediaControllerInterface* mediaController() const { return m_mediaController; }
 
 protected:
     explicit MediaControlElement(MediaControlElementType, HTMLElement*);
     ~MediaControlElement() { }
 
     virtual void setDisplayType(MediaControlElementType);
-    virtual bool isMediaControlElement() const { return true; }
 
 private:
     MediaControllerInterface* m_mediaController;
     MediaControlElementType m_displayType;
     HTMLElement* m_element;
 };
 
 // ----------------------------
 
 class MediaControlDivElement : public HTMLDivElement, public MediaControlElement {
 protected:
-    virtual bool isMediaControlElement() const OVERRIDE { return MediaControlElement::isMediaControlElement(); }
+    virtual bool isMediaControlElement() const OVERRIDE FINAL { return true; }
     explicit MediaControlDivElement(Document&, MediaControlElementType);
 };
 
 // ----------------------------
 
 class MediaControlInputElement : public HTMLInputElement, public MediaControlElement {
 protected:
-    virtual bool isMediaControlElement() const OVERRIDE { return MediaControlElement::isMediaControlElement(); }
+    virtual bool isMediaControlElement() const OVERRIDE FINAL { return true; }
     explicit MediaControlInputElement(Document&, MediaControlElementType);
 
 private:
     virtual void updateDisplayType() { }
     virtual bool isMouseFocusable() const OVERRIDE;
 };
 
 // ----------------------------
 
 class MediaControlTimeDisplayElement : public MediaControlDivElement {
@@ skipping 39 matching lines @@
 
     virtual void defaultEventHandler(Event*) OVERRIDE;
 
 private:
     bool m_clearMutedOnUserInteraction;
 };
 
 } // namespace WebCore
 
 #endif // MediaControlElementTypes_h