FINALizing of the Node hierarchy.

Source/core/html/HTMLTrackElement.h

 /*
  * Copyright (C) 2011 Google 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 16 matching lines @@
 #define HTMLTrackElement_h
 
 #include "HTMLElement.h"
 #include "LoadableTextTrack.h"
 #include "TextTrack.h"
 
 namespace WebCore {
 
 class HTMLMediaElement;
 
-class HTMLTrackElement : public HTMLElement, public TextTrackClient {
+class HTMLTrackElement FINAL : public HTMLElement, public TextTrackClient {
 public:
     static PassRefPtr<HTMLTrackElement> create(const QualifiedName&, Document*);
 
     KURL src() const;
     void setSrc(const String&);
 
     String kind();
     void setKind(const String&);
 
     String srclang() const;
@@ skipping 44 matching lines @@
     LoadableTextTrack* ensureTrack();
     virtual bool canLoadUrl(const KURL&);
 
     RefPtr<LoadableTextTrack> m_track;
     Timer<HTMLTrackElement> m_loadTimer;
 };
 
 }
 
 #endif