chromium/third_party/blink/web_tests/wpt_internal/css/css-masking/box-reflect-clip-in-frame.html

<!DOCTYPE html>
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1478908">
<link rel="match" href="box-reflect-clip-in-frame-ref.html">
<meta name="assert" content="-webkit-box-reflect under clip with an absolute descendant in an iframe should not draw contents outside of the iframe">
<iframe style="width: 300px; height: 300px" srcdoc='
  <div style="overflow: hidden">
    <div style="-webkit-box-reflect: right; height: 50px">
      <div style="position: absolute; width: 100px; height: 200px; background: blue"></div>
    </div>
  </div>'>
</iframe>