[WinCairo] Accelerated Compositing can't be disabled by using WebPreferences::acceleratedCompositingEnabled WebPreferences::acceleratedCompositingEnabled always retuns TRUE for !USE(CA). See also Bug 123214.
Created attachment 378703 [details] Patch
Created attachment 378704 [details] Patch
Created attachment 378705 [details] Patch
Comment on attachment 378705 [details] Patch Clearing flags on attachment: 378705 Committed r249829: <https://trac.webkit.org/changeset/249829>
All reviewed patches have been landed. Closing bug.
<rdar://problem/55332282>