nsServiceManager::GetService("@mozilla.org/xbl;1", NS_GET_IID(nsIXBLService), (nsISupports**) &gXBLService);
CallGetService("@mozilla.org/xbl;1", &gXBLService);
  nsXBLBindingRequest(const nsCString& aURL, nsIContent* aBoundElement)  {    mBindingURL = aURL;    mBoundElement = aBoundElement;    gRefCnt++;    if (gRefCnt == 1) {      nsServiceManager::GetService("@mozilla.org/xbl;1",                                   NS_GET_IID(nsIXBLService),                                   (nsISupports**) &gXBLService);    }  }