Update editing classes to use OVERRIDE / FINAL when needed

Source/core/editing/InsertNodeBeforeCommand.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 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef InsertNodeBeforeCommand_h
 #define InsertNodeBeforeCommand_h
 
 #include "core/editing/EditCommand.h"
 
 namespace WebCore {
 
-class InsertNodeBeforeCommand : public SimpleEditCommand {
+class InsertNodeBeforeCommand FINAL : public SimpleEditCommand {
 public:
     static PassRefPtr<InsertNodeBeforeCommand> create(PassRefPtr<Node> childToInsert, PassRefPtr<Node> childToInsertBefore,
         ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable)
     {
         return adoptRef(new InsertNodeBeforeCommand(childToInsert, childToInsertBefore, shouldAssumeContentIsAlwaysEditable));
     }
 
 private:
     InsertNodeBeforeCommand(PassRefPtr<Node> childToInsert, PassRefPtr<Node> childToInsertBefore, ShouldAssumeContentIsAlwaysEditable);
 
     virtual void doApply() OVERRIDE;
     virtual void doUnapply() OVERRIDE;
 
     RefPtr<Node> m_insertChild;
     RefPtr<Node> m_refChild;
     ShouldAssumeContentIsAlwaysEditable m_shouldAssumeContentIsAlwaysEditable;
 };
 
 } // namespace WebCore
 
 #endif // InsertNodeBeforeCommand_h