LayoutTests/fast/ruby/ruby-with-unbreakable-characters-incorrect-width.html

<meta charset="UTF-8">
<style>
div {
  font-family: Ahem;
  font-size: 20px;
  width: 200px;
  border: 1px solid green;
  text-align: justify;
  height: 30px;
  overflow: hidden;
}
</style>
<!-- PASS if all content is inside the green box -->
<div><ruby>XX<rt>XXXXXX</rt></ruby> <ruby>X<rt>XXX</rt></ruby><ruby>X<rt>XXX</rt></ruby>「<ruby>XXXX</ruby></div>