LayoutTests/fast/repaint/overlapping-lines-with-ink-overflow.html

<style>
body {
  margin: 0px;
}

div {
  line-height: 0.5;
  margin: 50px;
  font-family: Monospace;
  font-size: 40px;
}
</style>
<!-- Pass if both lines are "underlined". -->
<div><span id=box_shadow_horizontal>XXX<br>XXX</span></div>
<div style="writing-mode: vertical-lr"><span id=box_shadow_vertical>XXX<br>XXX</span></div>
<script src="resources/text-based-repaint.js" type="text/javascript"></script>
<script>
repaintTest = function() {
  box_shadow_horizontal.style.boxShadow = "inset green 0px -2px";
  box_shadow_vertical.style.boxShadow = "inset green -2px 0px";
};
runRepaintTest();
</script>