return NS_OK; }
nsHTMLMappedAttributes::HashValue(PRUint32& aValue) const{  aValue = NS_PTR_TO_INT32(mRuleMapper);    const HTMLAttribute* attr = &mFirst;  while (nsnull != attr) {    if (attr->mAttribute.mAtom) {      aValue = aValue ^ attr->HashValue();    }    attr = attr->mNext;  }  return NS_OK;}