AC was disabled for wincairo in r233725 but WebGL can still run without AC.
Created attachment 344987 [details] Patch
Created attachment 344989 [details] Patch
Comment on attachment 344989 [details] Patch Year. It's critically important for Web Inspector's Layer View. R+.
Comment on attachment 344989 [details] Patch Clearing flags on attachment: 344989 Committed r233827: <https://trac.webkit.org/changeset/233827>
All reviewed patches have been landed. Closing bug.
<rdar://problem/42185744>