<!DOCTYPE html>
<html>
<head>
<title></title>
<style>
h2 {
    column-span: all
}
div {
    column-width: 10px;
}
</style>
</head>
<body>
PASS if no assert in debug.
<body><div><div><h2></h2></div><video controls=""></video><h2></h2></div>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
</body>
</html>