void MenuGtk::Popup(GtkWidget* widget, GdkEvent* event) {
  DCHECK(event->type == GDK_BUTTON_PRESS)
      << "Non-button press event sent to RunMenuAt";

  GdkEventButton* event_button = reinterpret_cast<GdkEventButton*>(event);
  Popup(widget, event_button->button, event_button->time);
}

Unknown