Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/mediasource/MediaSource.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 23 matching lines @@
 #include "bindings/v8/ScriptWrappable.h"
 #include "modules/mediasource/MediaSourceBase.h"
 #include "modules/mediasource/SourceBuffer.h"
 #include "modules/mediasource/SourceBufferList.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class ExceptionState;
 
-class MediaSource : public MediaSourceBase, public ScriptWrappable {
+class MediaSource FINAL : public MediaSourceBase, public ScriptWrappable {
 public:
     static PassRefPtr<MediaSource> create(ExecutionContext*);
     virtual ~MediaSource();
 
     // MediaSource.idl methods
     SourceBufferList* sourceBuffers() { return m_sourceBuffers.get(); }
     SourceBufferList* activeSourceBuffers() { return m_activeSourceBuffers.get(); }
     SourceBuffer* addSourceBuffer(const String& type, ExceptionState&);
     void removeSourceBuffer(SourceBuffer*, ExceptionState&);
     static bool isTypeSupported(const String& type);
@@ skipping 11 matching lines @@
     virtual void onReadyStateChange(const AtomicString&, const AtomicString&) OVERRIDE;
     virtual Vector<RefPtr<TimeRanges> > activeRanges() const OVERRIDE;
 
     RefPtr<SourceBufferList> m_sourceBuffers;
     RefPtr<SourceBufferList> m_activeSourceBuffers;
 };
 
 } // namespace WebCore
 
 #endif