| <!DOCTYPE HTML> |
| <style> |
| .scroller { |
| width: 100px; |
| height: 100px; |
| border: 1px solid black; |
| overflow: scroll; |
| } |
| |
| .scrolled { |
| width: 40px; |
| height: 40px; |
| background: green; |
| } |
| |
| .neg-zorder { |
| position: relative; |
| z-index: -1; |
| -webkit-transform: translateZ(0); |
| background: blue; |
| } |
| </style> |
| <script> |
| if (window.internals) { |
| internals.settings.setAcceleratedCompositingForOverflowScrollEnabled(true); |
| } |
| </script> |
| <div class="scroller"> |
| <div class="scrolled neg-zorder" id="to-modify"></div> |
| <div class="scrolled"></div> |
| <div class="scrolled"></div> |
| <div class="scrolled"></div> |
| </div> |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(); |
| |
| if (window.internals) { |
| window.internals.forceCompositingUpdate(document); |
| window.internals.startTrackingRepaints(document); |
| } |
| |
| document.querySelector('style').appendChild(document.createTextNode('#to-modify { display: none }')); |
| |
| if (window.internals) { |
| var layerTree = document.createElement('pre'); |
| layerTree.innerHTML = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_PAINTING_PHASES); |
| window.internals.stopTrackingRepaints(document); |
| document.body.appendChild(layerTree); |
| } |
| </script> |
