NS_GetFileProtocolHandler(nsIFileProtocolHandler **result)
NS_GetFileProtocolHandler(nsIFileProtocolHandler **result, nsIIOService *ioService)
NS_GetFileProtocolHandler(nsIFileProtocolHandler **result){    ENSURE_IOSERVICE();    nsresult rv;    nsCOMPtr<nsIProtocolHandler> handler;    rv = gIOS->GetProtocolHandler("file", getter_AddRefs(handler));    if (NS_FAILED(rv)) return rv;    return CallQueryInterface(handler, result);}