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

Source/core/dom/MessageChannel.h

 /*
  * Copyright (C) 2008 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 20 matching lines @@
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class MessagePort;
 class ExecutionContext;
 
-class MessageChannel FINAL : public RefCountedWillBeGarbageCollected<MessageChannel>, public ScriptWrappable {
+class MessageChannel final : public RefCountedWillBeGarbageCollected<MessageChannel>, public ScriptWrappable {
     DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MessageChannel);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<MessageChannel> create(ExecutionContext* context)
     {
         return adoptRefWillBeNoop(new MessageChannel(context));
     }
 
     MessagePort* port1() const { return m_port1.get(); }
     MessagePort* port2() const { return m_port2.get(); }
 
     void trace(Visitor*);
 
 private:
     explicit MessageChannel(ExecutionContext*);
 
     RefPtrWillBeMember<MessagePort> m_port1;
     RefPtrWillBeMember<MessagePort> m_port2;
 };
 
 } // namespace blink
 
 #endif // MessageChannel_h