chromium/third_party/blink/web_tests/paint/invalidation/overflow/composited-overflow-local-background-removed.html

<!DOCTYPE html>
<script src="../resources/text-based-repaint.js"></script>
<script>
function repaintTest() {
    scroller.style.background = '';
}
onload = runRepaintAndPixelTest;
</script>
<style>
#scroller {
    overflow: scroll;
    width: 200px;
    height: 200px;
    will-change: transform;
}

.spacer {
    height: 300px;
}
</style>
<!-- #scroller has a locally attached background which will be painted into the
    scrolling contents layer. When the color is removed it should be cleared. -->
<div id="scroller" style="background: red local;">
    <p>Content</p>
    <div class="spacer"></div>
</div>