Remove unused CreateURLResponseInfo function.

ppapi/proxy/resource_creation_proxy.cc

Index: ppapi/proxy/resource_creation_proxy.cc
diff --git a/ppapi/proxy/resource_creation_proxy.cc b/ppapi/proxy/resource_creation_proxy.cc
index 95f748daaaf704dc5e7bcaaab48b26b4de358993..6d39f8021d8653a449e5f7e38072be4559336edf 100644
--- a/ppapi/proxy/resource_creation_proxy.cc
+++ b/ppapi/proxy/resource_creation_proxy.cc
@@ -179,15 +179,6 @@ PP_Resource ResourceCreationProxy::CreateURLRequestInfo(
       GetConnection(), instance, URLRequestInfoData()))->GetReference();
 }
 
-PP_Resource ResourceCreationProxy::CreateURLResponseInfo(
-    PP_Instance instance,
-    const URLResponseInfoData& data,
-    PP_Resource file_ref_resource) {
-  return (new URLResponseInfoResource(GetConnection(), instance,
-                                      data,
-                                      file_ref_resource))->GetReference();
-}
-
 PP_Resource ResourceCreationProxy::CreateWheelInputEvent(
     PP_Instance instance,
     PP_TimeTicks time_stamp,