Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/html

Source/core/html/HTMLMediaSource.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 55 matching lines @@
     virtual void close() = 0;
     virtual bool isClosed() const = 0;
     virtual double duration() const = 0;
     virtual PassRefPtrWillBeRawPtr<TimeRanges> buffered() const = 0;
 #if !ENABLE(OILPAN)
     virtual void refHTMLMediaSource() = 0;
     virtual void derefHTMLMediaSource() = 0;
 #endif
 
     // URLRegistrable
-    virtual URLRegistry& registry() const OVERRIDE { return *s_registry; }
+    virtual URLRegistry& registry() const override { return *s_registry; }
 
 private:
     static URLRegistry* s_registry;
 };
 
 }
 
 #endif