do_GetService( const nsCID& aCID, nsresult* error = 0 )
do_GetService( const char* aContractID, nsISupports* aServiceManager, nsresult* error = 0 )
do_GetService( const nsCID& aCID, nsresult* error = 0 )  {    return nsGetServiceByCID(aCID, 0, error);  }