Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderWordBreak.h

 /*
  * Copyright (C) 2007 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 15 matching lines @@
 
 #ifndef RenderWordBreak_h
 #define RenderWordBreak_h
 
 #include "RenderText.h"
 
 namespace WebCore {
 
 class HTMLElement;
 
-class RenderWordBreak : public RenderText {
+class RenderWordBreak FINAL : public RenderText {
 public:
     explicit RenderWordBreak(HTMLElement*);
 
     virtual const char* renderName() const;
     virtual bool isWordBreak() const;
 };
 
 }
 
 #endif