chromium/chrome/test/data/android/url_overriding/navigation_from_timer.html

<!DOCTYPE html>
<html>
<head>
  <script>
    function openHello() {
      window.location = 'intent://test/#Intent;scheme=externalappscheme;end';
    };

    setTimeout(openHello, 2000)
  </script>
</head>
<body>
  Welcome to Hello.
</body>
</html>