Cleanup namespace usage from animation to exported in platform/

Source/platform/exported/WebURLResponsePrivate.h

 /*
  * Copyright (C) 2009 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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 WebURLResponsePrivate_h
 #define WebURLResponsePrivate_h
 
 #include "public/platform/WebString.h"
 
-namespace blink { class ResourceResponse; }
+namespace blink {
 
-namespace blink {
+class ResourceResponse;
 
 class WebURLResponsePrivate {
 public:
     WebURLResponsePrivate() : m_resourceResponse(0) { }
 
     // Called by WebURLResponse when it no longer needs this object.
     virtual void dispose() = 0;
 
-    blink::ResourceResponse* m_resourceResponse;
+    ResourceResponse* m_resourceResponse;
 };
 
 } // namespace blink
 
 #endif