nsresult result;
PresShell::PageMove(PRBool aForward, PRBool aExtend){#if 1  return ScrollPage(aForward);#else  nsCOMPtr<nsIViewManager> viewManager;  nsresult result = GetViewManager(getter_AddRefs(viewManager));  if (NS_SUCCEEDED(result) && viewManager)  {    nsIScrollableView *scrollView;    result = viewManager->GetRootScrollableView(&scrollView);    if (NS_SUCCEEDED(result) && scrollView)    {          }  }  return result;#endif //0}