LayoutTests/fast/text/mark-matches-broken-line-rendering.html

<style>
p {
    display: inline-block;
    background-color: blue;
    width: 60px;
}
</style>
<p>
Quo usque tandem abutere, Catilina, patientia nostra?
</p>
<script>
if (window.internals) {
    internals.setMarkedTextMatchesAreHighlighted(true);
    internals.countMatchesForText("Quo usque tandem abutere, Catilina, patientia nostra?", 0, "mark");
}
</script>