onbeforeunload-focused-iframe-frame.html

<html>
<body onload="load()">
    This frame should get the focus.
    <input id="box"></input>
    <script>
        function load()
        {
            document.getElementById("box").focus();
            window.top.simulateCloseWindow();
        }
    </script>
</body>
</html>

chromium/third_party/blink/web_tests/fast/events/resources/onbeforeunload-focused-iframe-frame.html