Update remaining core classes to use OVERRIDE / FINAL when needed

Source/core/fileapi/Stream.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "core/dom/ActiveDOMObject.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class ExecutionContext;
 
-class Stream : public ScriptWrappable, public ActiveDOMObject, public RefCounted<Stream> {
+class Stream FINAL : public ScriptWrappable, public ActiveDOMObject, public RefCounted<Stream> {
 public:
     static PassRefPtr<Stream> create(ExecutionContext* context, const String& mediaType)
     {
         RefPtr<Stream> stream = adoptRef(new Stream(context, mediaType));
         stream->suspendIfNeeded();
         return stream.release();
     }
 
     virtual ~Stream();
 
@@ skipping 33 matching lines @@
     KURL m_internalURL;
 
     String m_mediaType;
 
     bool m_isNeutered;
 };
 
 } // namespace WebCore
 
 #endif // Stream_h