NS_IMETHOD    CreateAttributeNS(const nsString& aNamespaceURI, const nsString& aQualifiedName, nsIDOMAttr** aReturn) {
NS_IMETHOD    CreateAttributeNS(const nsAReadableString& aNamespaceURI, const nsAReadableString& aQualifiedName, nsIDOMAttr** aReturn) {
  NS_IMETHOD    CreateAttributeNS(const nsString& aNamespaceURI, const nsString& aQualifiedName, nsIDOMAttr** aReturn) {    return NS_OK;  }