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chromium/third_party/blink/web_tests/paint/invalidation/compositing/text-color-change.html 

<!DOCTYPE html>
<script src="../resources/text-based-repaint.js"></script>
<script>
function repaintTest() {
  document.getElementById('scroller').style.color = 'green';
}
onload = runRepaintAndPixelTest;
</script>
Tests invalidation of scrolling text. On composited scrolling, the whole text should be invalidated when the 'color' property of the container changes.
<pre id="scroller" style="width: 200px; height: 200px; overflow: scroll; color: red">
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</pre>