chromium/chrome/test/data/extensions/platform_apps/web_view/autoplay/main.html

<!--
Copyright 2017 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<!DOCTYPE html>
<html>
<body>
  <webview></webview>
  <script src=main.js></script>
</body>
</html>