Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/external/wpt/html/select/select-capitalize-sizing.html 

<!doctype html>
<meta charset=utf-8>
<title>select sizing with text-transform:capitalize</title>
<link rel="match" href="select-capitalize-sizing-ref.html">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1911550">
<style>
select {
  text-transform: capitalize;
}
.appearance-none {
  appearance: none;
  padding: 0;
  border: 1px solid;
}
</style>
<select>
  <option>x x x x x</option>
</select>
<br><br>
<select class=appearance-none>
  <option>x x x x x</option>
</select>