DummyLayoutRequest* request = new DummyLayoutRequest();
DummyLayoutRequest* request = new DummyLayoutRequest(aPresShell);
DummyLayoutRequest::Create(nsIChannel** aResult){  DummyLayoutRequest* request = new DummyLayoutRequest();  if (!request)      return NS_ERROR_OUT_OF_MEMORY;  *aResult = request;  NS_ADDREF(*aResult);  return NS_OK;}