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