detached-frame.html | Explore in Territory

<script>
function test() {
    var xhr = new XMLHttpRequest;
    xhr.open("GET", "detached-frame.html");
    xhr.send();
    xhr.onreadystatechange = function() {
        if (xhr.readyState == xhr.DONE) {
            var parentWindow = window.parent;
            parentWindow.document.body.innerHTML += "";
                parentWindow.testRunner.notifyDone();
        }
    }
}
</script>
<body onload="test()">

chromium/third_party/blink/web_tests/http/tests/misc/resources/detached-frame.html