chromium/third_party/blink/web_tests/fast/forms/select/select-list-box-mouse-focus.html

<script>
function test()
{
    if (window.testRunner)
        testRunner.dumpAsText();
    var select = document.getElementById("select");
    var rect = select.getBoundingClientRect();
    var x = rect.left + 10;
    var y = rect.top + 10;

    if (window.eventSender) {
        eventSender.mouseMoveTo(x, y);
        eventSender.mouseDown(0);
    }
}
function reportFocus()
{
    document.getElementById("result").innerHTML = "PASS";
}
</script>
<body onload="test()">
<p>The select below should be focused because we dispatched a mouse down event to it.</p>
<p id="result">FAIL</p>
<select id="select" size="4" onfocus="reportFocus()">
    <option>one</option>
    <option>two</option>
    <option>three</option>
    <option>four</option>
</select>
</body>