Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderNamedFlowThread.h

 /*
  * Copyright (C) 2012 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 25 matching lines @@
 namespace WebCore {
 
 class NamedFlow;
 class Node;
 class RenderNamedFlowThread;
 
 typedef ListHashSet<RenderNamedFlowThread*> RenderNamedFlowThreadList;
 typedef HashCountedSet<RenderNamedFlowThread*> RenderNamedFlowThreadCountedSet;
 typedef ListHashSet<Node*> NamedFlowContentNodes;
 
-class RenderNamedFlowThread : public RenderFlowThread {
+class RenderNamedFlowThread FINAL : public RenderFlowThread {
 public:
     virtual ~RenderNamedFlowThread();
 
     static RenderNamedFlowThread* createAnonymous(Document*, PassRefPtr<NamedFlow>);
 
     const AtomicString& flowThreadName() const;
 
     const RenderRegionList& invalidRenderRegionList() const { return m_invalidRegionList; }
 
     RenderObject* nextRendererForNode(Node*) const;
@@ skipping 79 matching lines @@
     return static_cast<const RenderNamedFlowThread*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderNamedFlowThread(const RenderNamedFlowThread*);
 
 } // namespace WebCore
 
 #endif // RenderNamedFlowThread_h