aFrame->FirstChild(aPresContext, nsnull, &aFrame);
aFrame = aFrame->GetFirstChild(nsnull);
static void RefreshAllContentFrames(nsIPresContext* aPresContext, nsIFrame * aFrame, nsIContent * aContent){  if (aFrame->GetContent() == aContent) {    ForceDrawFrame(aPresContext, (nsFrame *)aFrame);  }  aFrame->FirstChild(aPresContext, nsnull, &aFrame);  while (aFrame) {    RefreshAllContentFrames(aPresContext, aFrame, aContent);    aFrame = aFrame->GetNextSibling();  }}