Apply FINAL to the RenderObject hierarchy.

Source/core/rendering/RenderTextControl.h

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 82 matching lines @@
     return static_cast<const RenderTextControl*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderTextControl(const RenderTextControl*);
 
 // Renderer for our inner container, for <search> and others.
 // We can't use RenderFlexibleBox directly, because flexboxes have a different
 // baseline definition, and then inputs of different types wouldn't line up
 // anymore.
-class RenderTextControlInnerContainer : public RenderFlexibleBox {
+class RenderTextControlInnerContainer FINAL : public RenderFlexibleBox {
 public:
     explicit RenderTextControlInnerContainer(Element* element)
         : RenderFlexibleBox(element)
     { }
     virtual ~RenderTextControlInnerContainer() { }
 
     virtual int baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode position) const OVERRIDE
     {
         return RenderBlock::baselinePosition(baseline, firstLine, direction, position);
     }
     virtual int firstLineBoxBaseline() const OVERRIDE { return RenderBlock::firstLineBoxBaseline(); }
     virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return RenderBlock::inlineBlockBaseline(direction); }
 
 };
 
 
 } // namespace WebCore
 
 #endif // RenderTextControl_h