nsIFrame *frame; result = GetPrimaryFrameForFocusNode(&frame);
nsCOMPtr<nsIPresShell> presShell;  result = GetPresShell(getter_AddRefs(presShell));
nsDOMSelection::ScrollIntoView(){  nsresult result;  nsIFrame *frame;  result = GetPrimaryFrameForFocusNode(&frame);  if (NS_FAILED(result))    return result;  result = mRangeList->GetTracker()->ScrollFrameIntoView(frame);  return result;}