chromium/third_party/blink/web_tests/fast/frames/srcdoc/srcdoc-can-navigate.html

<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.dumpChildFrames();
    testRunner.waitUntilDone();
}
</script>
<iframe srcdoc="FAIL
<script>
window.location = 'data:text/html,PASS<script>if (window.testRunner) testRunner.notifyDone();<\/script>';</script>"></iframe>