Cleanup redundant namespace usage in Source/platform

Source/platform/mediastream/MediaStreamTrackSourcesRequest.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:
  * 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 14 matching lines @@
 
 #ifndef MediaStreamTrackSourcesRequest_h
 #define MediaStreamTrackSourcesRequest_h
 
 #include "platform/heap/Handle.h"
 #include "public/platform/WebVector.h"
 #include "wtf/Forward.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
+
 class WebSourceInfo;
-}
-
-namespace blink {
 
 class MediaStreamTrackSourcesRequest : public GarbageCollectedFinalized<MediaStreamTrackSourcesRequest> {
 public:
     class ExtraData {
     public:
         virtual ~ExtraData() { }
     };
 
     virtual ~MediaStreamTrackSourcesRequest() { }
 
     virtual String origin() = 0;
-    virtual void requestSucceeded(const blink::WebVector<blink::WebSourceInfo>&) = 0;
+    virtual void requestSucceeded(const blink::WebVector<WebSourceInfo>&) = 0;
 
     ExtraData* extraData() const { return m_extraData.get(); }
     void setExtraData(PassOwnPtr<ExtraData> extraData) { m_extraData = extraData; }
 
     virtual void trace(Visitor*) { }
 
 protected:
     MediaStreamTrackSourcesRequest() { }
 
 private:
     OwnPtr<ExtraData> m_extraData;
 };
 
 } // namespace blink
 
 #endif // MediaStreamTrackSourcesRequest_h