At this moment, we disable accelerated compositing for elements in a RenderFlowThread as it doesn't work properly. The WebKit Bug (https://bugs.webkit.org/show_bug.cgi?id=84900) is tracking the implementation. Add a separate test for this issue in LayoutTest/compositing and remove the testing code for accelerated compositing from LayoutTest/fast/regions/webkit-flow-renderer-layer.html.
Created attachment 165251 [details] Patch
Created attachment 165254 [details] Patch 2 Rewrite tests to make them more obvious when they pass/fail.
Comment on attachment 165254 [details] Patch 2 View in context: https://bugs.webkit.org/attachment.cgi?id=165254&action=review [Informal review] Looks good to me. Some minor comments. > LayoutTests/compositing/regions/webkit-flow-renderer-layer-compositing.html:9 > + width: 50px; height: 50px; background-color: green; Nit: Some properties use their own row, others don't. I would update these to follow the same style. > LayoutTests/compositing/regions/webkit-flow-renderer-layer-compositing.html:15 > +<p>Test for <a href="https://bugs.webkit.org/show_bug.cgi?id=84900"> [CSS Regions] Enable accelerated layers on elements inside a RenderFlowThread</a>.</p> Add a comment on the 84900 bug to remember that you've added this test.
Created attachment 165255 [details] Patch 3 Taking review into account.
Comment on attachment 165255 [details] Patch 3 Clearing flags on attachment: 165255 Committed r129304: <http://trac.webkit.org/changeset/129304>
All reviewed patches have been landed. Closing bug.
*** Bug 90770 has been marked as a duplicate of this bug. ***