LayoutTests/fast/inline/nested-vertical-alignment-with-top-and-line-height.html

<style>
div {
  width: 30px;
  line-height: 10;
  color: transparent;
}

span {
  vertical-align: top;
}

img {
  background-color: green;
  width: 30px;
  height: 30px;
}
</style>
<div><span><img></span></div>
<div><span>X<img></span></div>