nsAppShellService::RegisterTopLevelWindow(nsIXULWindow* aWindow)
nsAppShellService::RegisterTopLevelWindow(nsIWebShellWindow* aWindow)
nsAppShellService::RegisterTopLevelWindow(nsIXULWindow* aWindow){   mWindowList->AppendElement(aWindow);   if(mWindowMediator)      mWindowMediator->RegisterWindow(aWindow);   return NS_OK;}