FINALizing of the Node hierarchy.

Source/core/html/shadow/ClearButtonElement.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:
  * 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 13 matching lines @@
  */
 
 #ifndef ClearButtonElement_h
 #define ClearButtonElement_h
 
 #include "HTMLDivElement.h"
 #include <wtf/Forward.h>
 
 namespace WebCore {
 
-class ClearButtonElement : public HTMLDivElement {
+class ClearButtonElement FINAL : public HTMLDivElement {
 public:
     class ClearButtonOwner {
     public:
         virtual ~ClearButtonOwner() { }
         virtual void focusAndSelectClearButtonOwner() = 0;
         virtual bool shouldClearButtonRespondToMouseEvents() = 0;
         virtual void clearValue() = 0;
     };
 
     static PassRefPtr<ClearButtonElement> create(Document*, ClearButtonOwner&);
     void releaseCapture();
     void removeClearButtonOwner() { m_clearButtonOwner = 0; }
 
 private:
     ClearButtonElement(Document*, ClearButtonOwner&);
     virtual void detach();
     virtual bool isMouseFocusable() const { return false; }
     virtual void defaultEventHandler(Event*);
 
     ClearButtonOwner* m_clearButtonOwner;
     bool m_capturing;
 };
 
 } // namespace
 
 #endif // ClearButtonElement_h