nscoord   yDelta = aRect.height - mNaturalHeight; nsSize    kidSize;
nsStylePosition*  kidPosition; kidFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)kidPosition);
RootFrame::SetRect(const nsRect& aRect){  nsresult  rv = nsHTMLContainerFrame::SetRect(aRect);  // Make sure our child's frame is adjusted as well  nsIFrame* kidFrame = mFrames.FirstChild();  if (nsnull != kidFrame) {    nscoord   yDelta = aRect.height - mNaturalHeight;    nsSize    kidSize;    kidFrame->GetSize(kidSize);    kidFrame->SizeTo(kidSize.width, kidSize.height + yDelta);  }  return rv;}