matched-properties-cache-partial-match.html

<!doctype html>
<style>
.div1 {
    cursor: pointer;
}
button {
    border: 2px solid transparent;
    background: none;
}
</style>
<div class="div1">
    <button>hi</button>
</div>
<div>
    <button>hi</button>
</div>

chromium/third_party/blink/web_tests/fast/css/cache/matched-properties-cache-partial-match.html