Move CrossThreadCopier from platform/ to wtf/

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

Index: third_party/WebKit/Source/platform/network/ResourceError.h
diff --git a/third_party/WebKit/Source/platform/network/ResourceError.h b/third_party/WebKit/Source/platform/network/ResourceError.h
index 6dea74de1212aa1de51655ef98a423ebf63d6882..2b08e23e7ed0d0af27d60eaca40600aec257075c 100644
--- a/third_party/WebKit/Source/platform/network/ResourceError.h
+++ b/third_party/WebKit/Source/platform/network/ResourceError.h
@@ -29,6 +29,7 @@
 
 #include "platform/PlatformExport.h"
 #include "wtf/Allocator.h"
+#include "wtf/CrossThreadCopier.h"
 #include "wtf/text/WTFString.h"
 #include <iosfwd>
 
@@ -114,4 +115,18 @@ std::ostream& operator<<(std::ostream&, const ResourceError&);
 
 } // namespace blink
 
+namespace WTF {
+
+template <>
+struct CrossThreadCopier<blink::ResourceError> {
+    STATIC_ONLY(CrossThreadCopier);
+    typedef blink::ResourceError Type;
+    PLATFORM_EXPORT static Type copy(const blink::ResourceError& error)
+    {
+        return error.copy();
+    }
+};
+
+} // namespace WTF
+
 #endif // ResourceError_h