chromium/third_party/blink/web_tests/http/tests/origin_trials/webexposed/file-handling-origin-trial-interfaces.html

<!DOCTYPE html>
<meta charset="utf-8">
<!-- Generate token with the command:
generate_token.py http://127.0.0.1:8000 FileHandling --expire-timestamp=2000000000
-->

<meta http-equiv="origin-trial" content="AqDpvBKO5vwN29hVkukC+m96UKTvQTvnSklUKpjRaPGD4ZeteHMomcXdfWTiLzP9BQyg7lCUDenkJX7gAOdMMwcAAABUeyJvcmlnaW4iOiAiaHR0cDovLzEyNy4wLjAuMTo4MDAwIiwgImZlYXR1cmUiOiAiRmlsZUhhbmRsaW5nIiwgImV4cGlyeSI6IDIwMDAwMDAwMDB9" />
<title>File Handling API - interfaces exposed by origin trial</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/origin-trials-helper.js"></script>
<script>

test(t => {
  OriginTrialsHelper.check_properties_exist(this,
      {
        'LaunchQueue': ['setConsumer'],
        'LaunchParams': ['files']
      });

  assert_equals(typeof window.launchQueue, 'object');
  assert_equals(typeof window.launchQueue.setConsumer, 'function');
}, 'File Handling API interfaces and properties in Origin-Trial enabled document.');
</script>