clip-path-rotated-will-change-transform-ref.html

<!DOCTYPE html>
<div style="transform: rotate(45deg); width: 200px; height: 200px; will-change: transform">
  <div style="position: relative; top: 30px; left: 30px; width: 140px; height: 140px; background: green"></div>
</div>

chromium/third_party/blink/web_tests/external/wpt/css/css-masking/clip-path/clip-path-rotated-will-change-transform-ref.html