Update HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/HTMLImageLoader.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004 Apple Computer, Inc.
  *
  * 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 HTMLImageLoader_h
 #define HTMLImageLoader_h
 
 #include "core/loader/ImageLoader.h"
 
 namespace WebCore {
 
-class HTMLImageLoader : public ImageLoader {
+class HTMLImageLoader FINAL : public ImageLoader {
 public:
     HTMLImageLoader(Element*);
     virtual ~HTMLImageLoader();
 
-    virtual void dispatchLoadEvent();
-    virtual String sourceURI(const AtomicString&) const;
+    virtual void dispatchLoadEvent() OVERRIDE;
+    virtual String sourceURI(const AtomicString&) const OVERRIDE;
 
-    virtual void notifyFinished(Resource*);
+    virtual void notifyFinished(Resource*) OVERRIDE;
 };
 
 }
 
 #endif