NS_ENSURE_SUCCESS(NS_NewURI(getter_AddRefs(uri), nsLiteralString(aURL), nsnull),
NS_ENSURE_SUCCESS(NS_NewURI(getter_AddRefs(uri), aURL, nsnull),
nsWebShell::SetURL(const PRUnichar* aURL){  nsCOMPtr<nsIURI> uri;  NS_ENSURE_SUCCESS(NS_NewURI(getter_AddRefs(uri), nsLiteralString(aURL),                              nsnull),                    NS_ERROR_FAILURE);  SetCurrentURI(uri);  return NS_OK;}