virtual nsMargin GetActualScrollbarSizes() const { return mInner.GetActualScrollbarSizes(); }
nsMargin nsHTMLScrollFrame::GetActualScrollbarSizes() const { nsRect bounds = GetRect(); nsRect scrollArea; mInner.mScrollAreaBox->GetBounds(scrollArea);  return nsMargin(scrollArea.x, scrollArea.y, bounds.width - scrollArea.XMost(), bounds.height - scrollArea.YMost()); }
  virtual nsMargin GetActualScrollbarSizes() const {    return mInner.GetActualScrollbarSizes();  }