filter-repaint-on-accelerated-layer.html

<!DOCTYPE html>
<style>
div {
    width: 200px;
    height: 200px;
}

.blur {
    filter: blur(10px);
}

.accelerated {
    will-change: transform;
}

#resize {
    background-color: green;
}
</style>

<div class="blur">
    <div class="accelerated" id="resize"></div>
</div>

<script src="../resources/text-based-repaint.js"></script>
<script>
function repaintTest() {
    var resizeElement = document.getElementById("resize");
    resizeElement.style.width = "100px";
}
window.onload = runRepaintAndPixelTest;
</script>

chromium/third_party/blink/web_tests/paint/invalidation/filters/filter-repaint-on-accelerated-layer.html