transform-should-update-container-overflow.html

<!DOCTYPE html>
<style>
#container {
    width: 100px;
    height: 100px;
    position: relative;
    overflow: hidden;
}

#composited {
    will-change: transform;
    width: 100px;
    height: 100px;
    background-color: green;
}
</style>
This test verifies layout overflow will be recomputed when CSS transform is changed.
<div id="container" data-expected-scroll-width="100" data-expected-scroll-height="100">
    <div id="composited">
    </div>
</div>
<script src="../../resources/check-layout.js"></script>
<script>
    checkLayout("#container");
    var composited = document.getElementById('composited');
    composited.style.webkitTransform = 'translate3d(100px, 100px, 0)';
    var container = document.getElementById('container');
    container.setAttribute("data-expected-scroll-width", 200);
    container.setAttribute("data-expected-scroll-height", 200);
    checkLayout("#container");
</script>

chromium/third_party/blink/web_tests/compositing/overflow/transform-should-update-container-overflow.html