Replacing the OVERRIDE with override and FINAL with final

Source/platform/mediastream/MediaStreamCenter.h

 /*
  * Copyright 2014 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 34 matching lines @@
 class WebMediaStreamTrack;
 }
 
 namespace blink {
 
 class AudioSourceProvider;
 class MediaStreamComponent;
 class MediaStreamDescriptor;
 class MediaStreamTrackSourcesRequest;
 
-class PLATFORM_EXPORT MediaStreamCenter FINAL : public blink::WebMediaStreamCenterClient {
+class PLATFORM_EXPORT MediaStreamCenter final : public blink::WebMediaStreamCenterClient {
     WTF_MAKE_NONCOPYABLE(MediaStreamCenter);
 public:
     virtual ~MediaStreamCenter();
 
     static MediaStreamCenter& instance();
 
     bool getMediaStreamTrackSources(MediaStreamTrackSourcesRequest*);
 
     void didCreateMediaStreamTrack(MediaStreamComponent*);
     void didSetMediaStreamTrackEnabled(MediaStreamComponent*);
@@ skipping 11 matching lines @@
 
 private:
     MediaStreamCenter();
 
     OwnPtr<blink::WebMediaStreamCenter> m_private;
 };
 
 } // namespace blink
 
 #endif // MediaStreamCenter_h