chromium/third_party/blink/web_tests/http/tests/workers/resources/load-worker.html

<!DOCTYPE html>
<html>
<head>
    <script src="/resources/get-host-info.js"></script>
    <script>
        try {
            var worker = new SharedWorker(get_host_info().HTTPS_ORIGIN + "/workers/resources/worker-util.js", "worker");
            window.parent.postMessage({ success: true }, "*");
        } catch (e) {
            window.parent.postMessage({ error: e.toString() }, "*");
        }
    </script>
</head>
<body>
</body>
</html>