<!-- Based on fast/repaint/scrollbar-invalidation-on-resize.html -->
<!DOCTYPE html>
<script src="resources/paint-invalidation-test.js"></script>
<script>
function paintInvalidationTest() {
  document.getElementById('scrollable').style.width = '300px';
}
onload = runPaintInvalidationTest;
</script>
<style>
#scrollable {
  overflow: scroll;
  position: absolute;
  top: 50px;
  width: 100px;
  height: 100px;
}
</style>
When a scrollable area is resized, the invalidation area should cover non-composited scrollbars.
<div id="scrollable"></div>