LayoutTests/fast/dynamic/float-at-line-break.html

<div style="width: 25px; font: 25px Ahem; -webkit-font-smoothing: none;">
    <img style="width: 20px; height: 50px; background-color: blue;"><img id="image" style="width: 50px; height: 50px; background-color: yellow; display: none;"><span id="target" style="float: left;"></span>~</div>
<script>
    document.body.offsetTop;
    document.getElementById("image").style.display = "";

    document.body.offsetTop;
    var target = document.getElementById("target");
    target.parentNode.removeChild(target);
</script>