chromium/third_party/blink/web_tests/external/wpt/css/css-flexbox/stretch-flex-item-checkbox-input.html

<!DOCTYPE html>
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=768999">
<link rel="match" href="stretch-flex-item-checkbox-input-ref.html">
<div style="display: flex; width: 50px; height: 50px;">
  <input type="checkbox" style="width: 100%; margin: 0;">
</div>
<div style="display: flex; flex-direction: column; width: 50px; height: 50px;">
  <input type="checkbox" style="height: 100%; margin: 0;">
</div>