void LoginPromptBrowserTestObserver::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  if (type == chrome::NOTIFICATION_AUTH_NEEDED) {
    LoginNotificationDetails* login_details =
        content::Details<LoginNotificationDetails>(details).ptr();
    AddHandler(login_details->handler());
    auth_needed_count_++;
  } else if (type == chrome::NOTIFICATION_AUTH_SUPPLIED) {
    AuthSuppliedLoginNotificationDetails* login_details =
        content::Details<AuthSuppliedLoginNotificationDetails>(details).ptr();
    RemoveHandler(login_details->handler());
    auth_supplied_count_++;
  } else if (type == chrome::NOTIFICATION_AUTH_CANCELLED) {
    LoginNotificationDetails* login_details =
        content::Details<LoginNotificationDetails>(details).ptr();
    RemoveHandler(login_details->handler());
    auth_cancelled_count_++;
  }
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.