nsString& aResult) const
nsAWritableString& aResult) const
nsHTMLFrameSetElement::AttributeToString(nsIAtom* aAttribute,                                         const nsHTMLValue& aValue,                                         nsString& aResult) const{  if (aAttribute == nsHTMLAtoms::frameborder) {    // XXX need to check for correct mode    nsGenericHTMLElement::FrameborderValueToString(PR_FALSE, aValue, aResult);    return NS_CONTENT_ATTR_HAS_VALUE;  }   return mInner.AttributeToString(aAttribute, aValue, aResult);}