Update more core classes to use OVERRIDE / FINAL when needed

Source/core/rendering/RenderMedia.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 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 28 matching lines @@
 
     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
 
     const RenderObjectChildList* children() const { return &m_children; }
     RenderObjectChildList* children() { return &m_children; }
 
     HTMLMediaElement* mediaElement() const;
 
 protected:
-    virtual void layout();
+    virtual void layout() OVERRIDE;
 
 private:
     virtual RenderObjectChildList* virtualChildren() OVERRIDE FINAL { return children(); }
     virtual const RenderObjectChildList* virtualChildren() const OVERRIDE FINAL { return children(); }
 
     // FIXME: RenderMedia::layout makes assumptions about what children are allowed
     // so we can't support generated content.
     virtual bool canHaveGeneratedChildren() const OVERRIDE FINAL { return false; }
     virtual bool canHaveChildren() const OVERRIDE FINAL { return true; }
 
     virtual const char* renderName() const OVERRIDE { return "RenderMedia"; }
     virtual bool isMedia() const OVERRIDE FINAL { return true; }
     virtual bool isImage() const OVERRIDE FINAL { return false; }
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE;
 
     RenderObjectChildList m_children;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMedia, isMedia());
 
 } // namespace WebCore
 
 #endif // RenderMedia_h