Cleanup namespace usage in public/platform/{Web[P-W]*,linux/*}.h

public/platform/WebRTCICECandidate.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 18 matching lines @@
  */
 
 #ifndef WebRTCICECandidate_h
 #define WebRTCICECandidate_h
 
 #include "WebCommon.h"
 #include "WebPrivatePtr.h"
 #include "WebString.h"
 
 namespace blink {
-class RTCIceCandidateDescriptor;
-}
-
-namespace blink {
 
 class WebString;
 class WebRTCICECandidatePrivate;
 
 class WebRTCICECandidate {
 public:
     WebRTCICECandidate() { }
     WebRTCICECandidate(const WebRTCICECandidate& other) { assign(other); }
     ~WebRTCICECandidate() { reset(); }
 
@@ skipping 23 matching lines @@
     }
 #endif
 
 private:
     WebPrivatePtr<WebRTCICECandidatePrivate> m_private;
 };
 
 } // namespace blink
 
 #endif // WebRTCICECandidate_h