Update modules classes to use OVERRIDE / FINAL when needed

Source/modules/mediastream/RTCSessionDescriptionRequestImpl.h

 /*
  * Copyright (C) 2012 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
@@ skipping 26 matching lines @@
 namespace blink {
 class WebRTCSessionDescription;
 }
 
 namespace WebCore {
 
 class RTCErrorCallback;
 class RTCPeerConnection;
 class RTCSessionDescriptionCallback;
 
-class RTCSessionDescriptionRequestImpl : public RTCSessionDescriptionRequest, public ActiveDOMObject {
+class RTCSessionDescriptionRequestImpl FINAL : public RTCSessionDescriptionRequest, public ActiveDOMObject {
 public:
     static PassRefPtr<RTCSessionDescriptionRequestImpl> create(ExecutionContext*, PassOwnPtr<RTCSessionDescriptionCallback>, PassOwnPtr<RTCErrorCallback>);
     virtual ~RTCSessionDescriptionRequestImpl();
 
     virtual void requestSucceeded(const blink::WebRTCSessionDescription&) OVERRIDE;
     virtual void requestFailed(const String& error) OVERRIDE;
 
     // ActiveDOMObject
     virtual void stop() OVERRIDE;
 
 private:
     RTCSessionDescriptionRequestImpl(ExecutionContext*, PassOwnPtr<RTCSessionDescriptionCallback>, PassOwnPtr<RTCErrorCallback>);
 
     void clear();
 
     OwnPtr<RTCSessionDescriptionCallback> m_successCallback;
     OwnPtr<RTCErrorCallback> m_errorCallback;
 };
 
 } // namespace WebCore
 
 #endif // RTCSessionDescriptionRequestImpl_h