chromium/third_party/blink/web_tests/http/tests/origin_trials/sample-api-script-added-before-access.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Test Sample API when trial is enabled by script-added meta tag, without touching the objects</title>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script src="../resources/origin-trials-helper.js"></script>
<script src="resources/origintrials.js"></script>
<script>

// TODO(iclelland): Generate this sample token during the build. The token
//   below will expire in 2033, but it would be better to always have a token which
//   is guaranteed to be valid when the tests are run. -->
// Generate this token with the command:
// generate_token.py http://127.0.0.1:8000 Frobulate -expire-timestamp=2000000000
var token = "AlCoOPbezqtrGMzSzbLQC4c+oPqO6yuioemcBPjgcXajF8jtmZr4B8tJRPAARPbsX6hDeVyXCKHzEJfpBXvZgQEAAABReyJvcmlnaW4iOiAiaHR0cDovLzEyNy4wLjAuMTo4MDAwIiwgImZlYXR1cmUiOiAiRnJvYnVsYXRlIiwgImV4cGlyeSI6IDIwMDAwMDAwMDB9";

// Do not access internals.OriginTrials() before adding the token. Can then test
// the case where the target object(s) do not exist when the trial is enabled.

// Add the token to enable the trial
OriginTrialsHelper.add_token(token);

// The trial is now enabled, by the token added via script.
expect_success();
expect_success_bindings();

</script>