chromium/third_party/blink/web_tests/fast/events/resources/drag-outside-window-frame.html

<body onload="test()">
<script type="text/javascript">
document.addEventListener("mousemove", mousemoved);

var result = "FAIL";

function mousemoved(event)
{
    if (event.clientX < -1)
        result = "PASS";
}

function test()
{
    if (!window.testRunner)
        return;
    testRunner.dumpAsText();
    eventSender.mouseMoveTo(50, 100);
    eventSender.mouseDown();
    eventSender.mouseMoveTo(-50, 100);
    eventSender.mouseUp();
    alert("Test result: " + result);
}
</script>
<p>
    This is a test for <i><a href="https://bugs.webkit.org/show_bug.cgi?id=5923">http://bugzilla.opendarwin.org/show_bug.cgi?id=5923</a>
    REGRESSION: scrolling on Google maps continues after the mouse is released outside the window</i>.
</p>
<p>
    (Cannot run interactively)
</p>
</body>