nsCOMPtr<nsIAtom> tagName; aNodeInfo->GetNameAtom(*getter_AddRefs(tagName));
nsCOMPtr<nsIAtom> tagName = aNodeInfo->GetNameAtom();
StyleHintFor(nsINodeInfo* aNodeInfo){    nsCOMPtr<nsIAtom> tagName;    aNodeInfo->GetNameAtom(*getter_AddRefs(tagName));    if ((tagName == nsXULAtoms::broadcaster) ||        (tagName == nsXULAtoms::command) ||        (tagName == nsXULAtoms::key)) {        return NS_STYLE_HINT_NONE;    }    return NS_STYLE_HINT_UNKNOWN;}