Move CrossThreadCopier from platform/ to wtf/

third_party/WebKit/Source/platform/network/ResourceResponse.h

Index: third_party/WebKit/Source/platform/network/ResourceResponse.h
diff --git a/third_party/WebKit/Source/platform/network/ResourceResponse.h b/third_party/WebKit/Source/platform/network/ResourceResponse.h
index a87900aeeabcc869eda75c8baf9a91a697ac0850..3bbef4a57464b9b9e7f6d90320b0683be0b9b16e 100644
--- a/third_party/WebKit/Source/platform/network/ResourceResponse.h
+++ b/third_party/WebKit/Source/platform/network/ResourceResponse.h
@@ -457,4 +457,18 @@ public:
 
 } // namespace blink
 
+namespace WTF {
+
+template <>
+struct CrossThreadCopier<blink::ResourceResponse> {
+    STATIC_ONLY(CrossThreadCopier);
+    typedef PassedWrapper<std::unique_ptr<blink::CrossThreadResourceResponseData>> Type;
+    PLATFORM_EXPORT static Type copy(const blink::ResourceResponse& response)
+    {
+        return passed(response.copyData());
+    }
+};
+
+} // namespace WTF
+
 #endif // ResourceResponse_h