nsServiceManager::ReleaseService("@mozilla.org/xbl;1", gXBLService); gXBLService = nsnull;
NS_IF_RELEASE(gXBLService);
  ~nsXBLBindingRequest()  {    gRefCnt--;    if (gRefCnt == 0) {      nsServiceManager::ReleaseService("@mozilla.org/xbl;1", gXBLService);      gXBLService = nsnull;    }  }