n resource, the timing allow
check algorithm will succeed when the value of Timing-Allow-Origin is null and
the origin is an opaque origin.</p>
<div id="log"></div>
<iframe id="frameContext"></iframe>
<script>
const origin = get_host_info()["ORIGIN"];
const frame_content = `data:text/html;utf8,<body>
  <script src="${origin}/resources/testharness.js"></` + `script>
  <script>
    const url = "${origin}/resource-timing/resources/TAOResponse.py?tao=null";
    promise_test(() => { return new Promise((resolve, 