Cleanup namespace usage from animation to exported in platform/

Source/platform/exported/WebURLResponsePrivate.h

Index: Source/platform/exported/WebURLResponsePrivate.h
diff --git a/Source/platform/exported/WebURLResponsePrivate.h b/Source/platform/exported/WebURLResponsePrivate.h
index 814a71490f30cac8ac9f9cff4251adfc9832f2e4..6a408f32f646eb6323761fe9649862aa1149a416 100644
--- a/Source/platform/exported/WebURLResponsePrivate.h
+++ b/Source/platform/exported/WebURLResponsePrivate.h
@@ -33,10 +33,10 @@
 
 #include "public/platform/WebString.h"
 
-namespace blink { class ResourceResponse; }
-
 namespace blink {
 
+class ResourceResponse;
+
 class WebURLResponsePrivate {
 public:
     WebURLResponsePrivate() : m_resourceResponse(0) { }
@@ -44,7 +44,7 @@ public:
     // Called by WebURLResponse when it no longer needs this object.
     virtual void dispose() = 0;
 
-    blink::ResourceResponse* m_resourceResponse;
+    ResourceResponse* m_resourceResponse;
 };
 
 } // namespace blink