(void)mLookup->Suspend(this); return FireStop(status); } return NS_OK;
if (mUserListener)  rv = FireStop(status); mLookup = nsnull; return rv;
nsDNSRequest::Cancel(nsresult status){    NS_ASSERTION(NS_FAILED(status), "shouldn't cancel with a success code");    mStatus = status;    if (mUserListener) {        // Hold onto a reference to ourself because if we decide to remove        // this request from the mRequests list, it could be the last         // reference, causing ourself to be deleted. We need to live until        // this method completes:        nsCOMPtr<nsIRequest> req = this;        (void)mLookup->Suspend(this);        return FireStop(status);    }    return NS_OK;}