Update editing classes to use OVERRIDE / FINAL when needed

Source/core/editing/SetNodeAttributeCommand.h

 /*
  * Copyright (C) 2005, 2006, 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 13 matching lines @@
  */
 
 #ifndef SetNodeAttributeCommand_h
 #define SetNodeAttributeCommand_h
 
 #include "core/dom/QualifiedName.h"
 #include "core/editing/EditCommand.h"
 
 namespace WebCore {
 
-class SetNodeAttributeCommand : public SimpleEditCommand {
+class SetNodeAttributeCommand FINAL : public SimpleEditCommand {
 public:
     static PassRefPtr<SetNodeAttributeCommand> create(PassRefPtr<Element> element, const QualifiedName& attribute, const AtomicString& value)
     {
         return adoptRef(new SetNodeAttributeCommand(element, attribute, value));
     }
 
 private:
     SetNodeAttributeCommand(PassRefPtr<Element>, const QualifiedName& attribute, const AtomicString& value);
 
     virtual void doApply() OVERRIDE;
     virtual void doUnapply() OVERRIDE;
 
     RefPtr<Element> m_element;
     QualifiedName m_attribute;
     AtomicString m_value;
     AtomicString m_oldValue;
 };
 
 } // namespace WebCore
 
 #endif // SetNodeAttributeCommand_h