MOZ_COUNT_CTOR(PendingSheetData);
  PendingSheetData(nsICSSStyleSheet* aSheet, PRInt32 aDocIndex,                   nsIContent* aElement)    : mSheet(aSheet),      mDocIndex(aDocIndex),      mOwningElement(aElement),      mNotify(PR_FALSE)  {    NS_ADDREF(mSheet);    NS_IF_ADDREF(mOwningElement);  }