FINALizing of the Node hierarchy.

Source/core/html/HTMLDetailsElement.h

 /*
  * Copyright (C) 2010, 2011 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef HTMLDetailsElement_h
 #define HTMLDetailsElement_h
 
 #include "HTMLElement.h"
 
 namespace WebCore {
 
-class HTMLDetailsElement : public HTMLElement {
+class HTMLDetailsElement FINAL : public HTMLElement {
 public:
     static PassRefPtr<HTMLDetailsElement> create(const QualifiedName& tagName, Document* document);
     void toggleOpen();
 
     Element* findMainSummary() const;
 
 private:
     HTMLDetailsElement(const QualifiedName&, Document*);
 
     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
     virtual bool childShouldCreateRenderer(const NodeRenderingContext&) const OVERRIDE;
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 
     virtual void didAddUserAgentShadowRoot(ShadowRoot*) OVERRIDE;
 
     bool m_isOpen;
 };
 
 } // namespace WebCore
 
 #endif // HTMLDetailsElement_h