Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/webaudio/DefaultAudioDestinationNode.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 @@
 
 #include "platform/audio/AudioDestination.h"
 #include "modules/webaudio/AudioDestinationNode.h"
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
 class AudioContext;
 class ExceptionState;
 
-class DefaultAudioDestinationNode : public AudioDestinationNode {
+class DefaultAudioDestinationNode FINAL : public AudioDestinationNode {
 public:
     static PassRefPtr<DefaultAudioDestinationNode> create(AudioContext* context)
     {
         return adoptRef(new DefaultAudioDestinationNode(context));
     }
 
     virtual ~DefaultAudioDestinationNode();
 
     // AudioNode
     virtual void initialize() OVERRIDE;
@@ skipping 10 matching lines @@
     void createDestination();
 
     OwnPtr<AudioDestination> m_destination;
     String m_inputDeviceId;
     unsigned m_numberOfInputChannels;
 };
 
 } // namespace WebCore
 
 #endif // DefaultAudioDestinationNode_h