if (result && IsPopupFrame(result)) result = GetNextSibling(result);
nsFocusIterator::GetNextSibling(nsIFrame* aFrame){  nsIFrame* result = 0;  nsIFrame* placeholder = GetPlaceholderFrame(aFrame);  if (placeholder) {    placeholder->GetNextSibling(&result);    if (result)      result = GetRealFrame(result);  }  return result;}