const nsString& aValue,
const nsAReadableString& aValue,
nsHTMLHeadingElement::StringToAttribute(nsIAtom* aAttribute,                                        const nsString& aValue,                                        nsHTMLValue& aResult){  if (aAttribute == nsHTMLAtoms::align) {    if (mInner.ParseDivAlignValue(aValue, aResult)) {      return NS_CONTENT_ATTR_HAS_VALUE;    }  }  return NS_CONTENT_ATTR_NOT_THERE;}