Backed out changeset 4d03c3ba2969 (bug 1131796) for bustage on a CLOSED TREE

--HG--
extra : amend_source : 07e872ce971a620a08b68fbc2b3afdcccaff8539

dom/bindings/DOMJSProxyHandler.cpp

@@ -112,8 +112,9 @@ DOMProxyHandler::EnsureExpandoObject(JSContext* cx, JS::Handle<JSObject*> obj)
     expandoAndGeneration = nullptr;
   }
 
+  JS::Rooted<JSObject*> parent(cx, js::GetObjectParent(obj));
   JS::Rooted<JSObject*> expando(cx,
-    JS_NewObjectWithGivenProto(cx, nullptr, JS::NullPtr()));
+    JS_NewObjectWithGivenProto(cx, nullptr, JS::NullPtr(), parent));
   if (!expando) {
     return nullptr;
   }