chromium/chrome/test/data/banners/no_manifest_test_page.html

<html>
  <head>
    <title>Web app banner test page</title>
    <script src="main.js"></script>
  </head>
  <body onload="initializeWithWorker('service_worker.js')">
    Do-nothing page with a service worker, but no manifest.
  </body>
</html>