chromium/ios/testing/data/http_server_files/username_password_field_form.html

<!DOCTYPE html>
<!-- Copyright 2018 The Chromium Authors
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file. -->
<html>
<body>
hello!
<form method=POST action="submit">
  <input type="text" name="username" id="username"><br>
  <input type="password" name="password" id="password"><br>
  <input type="submit" value="submit" id="submit">
</form>
</body>
</html>