Backed out a19daae11647 (Bug 1186307) for W8 and W4 bustage on CLOSED TREE

dom/base/PostMessageEvent.cpp

@@ -113,11 +113,8 @@ PostMessageEvent::Run()
                           false /*cancelable */, messageData, mCallerOrigin,
                           EmptyString(), mSource);
 
-  nsTArray<nsRefPtr<MessagePortBase>> ports;
-  TakeTransferredPorts(ports);
-
   event->SetPorts(new MessagePortList(static_cast<dom::Event*>(event.get()),
-                                      ports));
+                                      GetTransferredPorts()));
 
   // We can't simply call dispatchEvent on the window because doing so ends
   // up flipping the trusted bit on the event, and we don't want that to