NS_IMETHOD StyleRuleChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule, nsChangeHint aHint) { return NS_OK; }
HTMLContentSink::StyleRuleChanged(nsIDocument *aDocument, nsIStyleSheet* aStyleSheet, nsIStyleRule* aStyleRule, nsChangeHint aHint) { return NS_OK; }
  NS_IMETHOD StyleRuleChanged(nsIDocument *aDocument,                              nsIStyleSheet* aStyleSheet,                              nsIStyleRule* aStyleRule, nsChangeHint aHint)  {    return NS_OK;  }