CancelReflowCommand(aFrame);
CancelReflowCommand(aFrame, nsnull);
PresShell::NotifyDestroyingFrame(nsIFrame* aFrame){  // Cancel any pending reflow commands targeted at this frame  CancelReflowCommand(aFrame);  // Notify the frame manager  if (mFrameManager) {    mFrameManager->NotifyDestroyingFrame(aFrame);  }  return NS_OK;}