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chromium/third_party/blink/web_tests/paint/invalidation/caret-scrolled-expected.html 

<!DOCTYPE html>
<div style="position: relative; top: 100px; width: 200px; height: 200px; overflow: hidden; border: 1px solid black">
  <div id="target" contenteditable
       style="position: relative; top: -50px; font-size: 100px; color: green; outline-style: none">
    <br>
    <br>
    <br>
    <br>
  </div>
</div>
<script>
target.focus();
</script>