chromium/chrome/test/data/web_apps/minimal_ui/text_handler.html

<!DOCTYPE html>
<html>
<head>
  <title>Site B - Text Handler</title>
    <script src="/web_apps/test_utils.js"></script>
</head>
<body>
  <h1>Site B - Text Handler</h1>
  <div>
    <p>
        TODO: Add code to verify the text files loaded are correct.
    </p>
    <p>
      This site is used for dPWA integration tests, and is subject to modification to support that framework. See
      <a
        href="https://chromium.googlesource.com/chromium/src/+/main/docs/webapps/integration-testing-framework.md">https://chromium.googlesource.com/chromium/src/+/main/docs/webapps/integration-testing-framework.md</a>
    </p>
  </div>
</body>
</html>