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

<!DOCTYPE html>
<meta charset="utf-8">
<!-- Generate token with the command:
generate_token.py http://127.0.0.1:8000 FedCM --expire-timestamp=2000000000
-- -->
<meta http-equiv="origin-trial"
  content="A+HpfnpkW4XI4PiU2WZ8uegm47AUP0SjrLLcjGNbg7Vl6EexswWCM1vOSpoLdPEapiUkB9V+/UOm4yIRD59ybgoAAABNeyJvcmlnaW4iOiAiaHR0cDovLzEyNy4wLjAuMTo4MDAwIiwgImZlYXR1cmUiOiAiRmVkQ00iLCAiZXhwaXJ5IjogMjAwMDAwMDAwMH0=" />
<title>FedCM API - interfaces and properties 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,
        {
          'IdentityCredential': ['token'],
        });
  }, 'FedCM API interfaces and properties in Origin-Trial enabled document.');
</script>