aChild->GetContent(getter_AddRefs(child));
child = aChild->GetContent();
static void GetInsertionPoint(nsIPresShell* aShell, nsIFrame* aFrame, nsIFrame* aChild,                              nsIFrame** aResult){  nsCOMPtr<nsIStyleSet> styleSet;  aShell->GetStyleSet(getter_AddRefs(styleSet));  nsCOMPtr<nsIContent> child;  if (aChild)    aChild->GetContent(getter_AddRefs(child));  styleSet->GetInsertionPoint(aShell, aFrame, child, aResult);}