Cleanup namespace usage in Source/web/*.h

Source/web/UserMediaClientImpl.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:
  *
  *     * 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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef UserMediaClientImpl_h
 #define UserMediaClientImpl_h
 
 #include "modules/mediastream/UserMediaClient.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
+
 class MediaDevicesRequest;
 class UserMediaRequest;
-}
-
-namespace blink {
-
 class WebUserMediaClient;
 class WebLocalFrameImpl;
 
-class UserMediaClientImpl FINAL : public blink::UserMediaClient {
+class UserMediaClientImpl FINAL : public UserMediaClient {
 public:
     explicit UserMediaClientImpl(WebLocalFrameImpl*);
 
-    // blink::UserMediaClient ----------------------------------------------
-    virtual void requestUserMedia(blink::UserMediaRequest*) OVERRIDE;
-    virtual void cancelUserMediaRequest(blink::UserMediaRequest*) OVERRIDE;
-    virtual void requestMediaDevices(blink::MediaDevicesRequest*) OVERRIDE;
-    virtual void cancelMediaDevicesRequest(blink::MediaDevicesRequest*) OVERRIDE;
+    // UserMediaClient ----------------------------------------------
+    virtual void requestUserMedia(UserMediaRequest*) OVERRIDE;
+    virtual void cancelUserMediaRequest(UserMediaRequest*) OVERRIDE;
+    virtual void requestMediaDevices(MediaDevicesRequest*) OVERRIDE;
+    virtual void cancelMediaDevicesRequest(MediaDevicesRequest*) OVERRIDE;
 
 private:
     UserMediaClientImpl();
 
     WebUserMediaClient* m_client;
 };
 
 } // namespace blink
 
 #endif // UserMediaClientImpl_h