Update DOM classes to use OVERRIDE / FINAL when needed

Source/core/dom/DocumentLifecycleNotifier.h

 /*
  * Copyright (C) 2013 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 23 matching lines @@
 
 class Document;
 
 class DocumentLifecycleNotifier : public LifecycleNotifier<Document> {
 public:
     static PassOwnPtr<DocumentLifecycleNotifier> create(Document*);
 
     void notifyDocumentWasDetached();
     void notifyDocumentWasDisposed();
 
-    virtual void addObserver(Observer*) OVERRIDE;
-    virtual void removeObserver(Observer*) OVERRIDE;
+    virtual void addObserver(Observer*) OVERRIDE FINAL;
+    virtual void removeObserver(Observer*) OVERRIDE FINAL;
 
 private:
     explicit DocumentLifecycleNotifier(Document*);
 
     typedef HashSet<DocumentLifecycleObserver*> DocumentObserverSet;
     DocumentObserverSet m_documentObservers;
 };
 
 inline PassOwnPtr<DocumentLifecycleNotifier> DocumentLifecycleNotifier::create(Document* document)
 {
@@ skipping 10 matching lines @@
 inline void DocumentLifecycleNotifier::notifyDocumentWasDisposed()
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);
     for (DocumentObserverSet::iterator i = m_documentObservers.begin(); i != m_documentObservers.end(); ++i)
         (*i)->documentWasDisposed();
 }
 
 } // namespace WebCore
 
 #endif // DocumentLifecycleNotifier_h