Cleanup namespace usage in public/platform/Web[A-M]*.h.

public/platform/WebMediaStreamCenterClient.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:
  *
  *     * 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebMediaStreamCenterClient_h
 #define WebMediaStreamCenterClient_h
 
 #include "WebCommon.h"
 
 namespace blink {
+
 class WebMediaStream;
 class WebMediaStreamTrack;
 
 class BLINK_PLATFORM_EXPORT WebMediaStreamCenterClient {
 public:
     virtual ~WebMediaStreamCenterClient() { }
 
     virtual void stopLocalMediaStream(const WebMediaStream&) = 0;
 };
 
 } // namespace blink
 
 #endif // WebMediaStreamCenterClient_h