autocomplete_email_as_username.html

<html>
      <head>
            <meta name="viewport" "content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
      </head>"
      <body>
            <form method="POST">
                  <input type="text" id="username_field" name="username_field" autocomplete="email">
                  <input type="password" id="password_field" name="password_field">
                  <input type="submit" id="input_submit_button" name="input_submit_button">
                  <input type="submit" />
            </form>
      </body>
</html>

chromium/chrome/test/data/password/autocomplete_email_as_username.html