Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/[css|rendering|clipboard]

Source/core/rendering/RenderMediaControlElements.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 16 matching lines @@
 
 #ifndef RenderMediaControlElements_h
 #define RenderMediaControlElements_h
 
 #include "core/html/shadow/MediaControlElements.h"
 #include "core/rendering/RenderBlockFlow.h"
 #include "core/rendering/RenderFlexibleBox.h"
 
 namespace blink {
 
-class RenderTextTrackContainerElement FINAL : public RenderBlockFlow {
+class RenderTextTrackContainerElement final : public RenderBlockFlow {
 public:
     RenderTextTrackContainerElement(Element*);
 
 private:
-    virtual void layout() OVERRIDE;
+    virtual void layout() override;
 };
 
 
 } // namespace blink
 
 #endif // RenderMediaControlElements_h