<!DOCTYPE html>
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1441341">
<link rel="match" href="input-no-centering-ref.html">
<style>
input {
  appearance: none;
  margin: 0;
  width: 200px;
  height: 200px;
}
input:before {
  content: "";
  display: block;
  width: 100px;
  height: 100px;
  background: green;
}
</style>
<input type="checkbox">
