Disallow Member<T> in CrossThreadCopier

third_party/WebKit/Source/platform/CrossThreadCopier.h

 /*
  * Copyright (C) 2009, 2010 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 188 matching lines @@
     PLATFORM_EXPORT static Type copy(const ResourceRequest&);
 };
 
 template <>
 struct CrossThreadCopier<ResourceResponse> {
     STATIC_ONLY(CrossThreadCopier);
     typedef WTF::PassedWrapper<std::unique_ptr<CrossThreadResourceResponseData>> Type;
     PLATFORM_EXPORT static Type copy(const ResourceResponse&);
 };
 
-template <typename T>
-struct CrossThreadCopier<Member<T>> {
-    STATIC_ONLY(CrossThreadCopier);
-    static_assert(IsGarbageCollectedType<T>::value, "T must be a garbage-collected type.");
-    typedef T* Type;
-    static Type copy(const Member<T>& ptr)
-    {
-        return ptr;
-    }
-};
-
 } // namespace blink
 
 #endif // CrossThreadCopier_h