val->SetTwips(font? font->mFont.size:0);
val->SetTwips(font? font->mSize:0);
nsComputedDOMStyle::GetFontSize(nsIFrame *aFrame,                             nsIDOMCSSPrimitiveValue*& aValue){  nsROCSSPrimitiveValue* val=GetROCSSPrimitiveValue();  NS_ENSURE_TRUE(val, NS_ERROR_OUT_OF_MEMORY);  const nsStyleFont* font=nsnull;  GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&)font, aFrame);  val->SetTwips(font? font->mFont.size:0);  return val->QueryInterface(NS_GET_IID(nsIDOMCSSPrimitiveValue),                             (void **)&aValue);}