chromium/third_party/blink/web_tests/external/wpt/css/css-fonts/rlh-in-monospace-ref.html

<!DOCTYPE html>
<p>The following two lines should look exactly the same.</p>

<div style="font-family: sans-serif; font-size: 1rlh">
  Text.
</div>

<div style="font-family: sans-serif; font-size: 1rlh">
  Text.
</div>