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

public/platform/WebSocketHandshakeResponseInfo.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:
  *
  *     * 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 WebSocketHandshakeResponseInfo_h
 #define WebSocketHandshakeResponseInfo_h
 
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebNonCopyable.h"
 #include "public/platform/WebPrivateOwnPtr.h"
 
 namespace blink {
-class WebSocketHandshakeResponse;
-} // namespace blink
-
-namespace blink {
 
 class WebString;
+class WebSocketHandshakeResponse;
 
 class WebSocketHandshakeResponseInfo : public WebNonCopyable {
 public:
     BLINK_PLATFORM_EXPORT WebSocketHandshakeResponseInfo();
     BLINK_PLATFORM_EXPORT ~WebSocketHandshakeResponseInfo();
 
     BLINK_PLATFORM_EXPORT void setStatusCode(int);
     BLINK_PLATFORM_EXPORT void setStatusText(const WebString&);
     BLINK_PLATFORM_EXPORT void addHeaderField(const WebString& name, const WebString& value);
     BLINK_PLATFORM_EXPORT void setHeadersText(const WebString&);
 
 #if INSIDE_BLINK
-    BLINK_PLATFORM_EXPORT const blink::WebSocketHandshakeResponse& toCoreResponse() const { return *m_private.get(); }
+    BLINK_PLATFORM_EXPORT const WebSocketHandshakeResponse& toCoreResponse() const { return *m_private.get(); }
 #endif // INSIDE_BLINK
 
 private:
-    WebPrivateOwnPtr<blink::WebSocketHandshakeResponse> m_private;
+    WebPrivateOwnPtr<WebSocketHandshakeResponse> m_private;
 };
 
 } // namespace blink
 
 #endif // WebSocketHandshakeResponseInfo_h