LayoutTests/fast/text/justify-nbsp.html

<div style="border: solid blue; font: 25px ahem; width: 650px; text-align: justify; line-height: 2; -webkit-font-smoothing: none;">
    <span>a&nbsp;b&nbsp;c&nbsp;d </span>e f g h xxxxxxxxxxx
    <br>
    <span>a b c d </span>e f g h xxxxxxxxxxx
</div>