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