The last ANGLE roll in https://bugs.webkit.org/show_bug.cgi?id=202780 broke WebKit's USE_ANGLE=1 build due to not including FrameCapture.cpp. Upstream ANGLE bug https://bugs.chromium.org/p/angleproject/issues/detail?id=4001 has been filed about this issue and a patch is up for review. A small patch can be applied to WebKit's copy of ANGLE to fix this build.
Created attachment 380803 [details] Patch
Tested locally with USE_ANGLE=1 build. Sorry for the breakage; I was obviously testing the USE_ANGLE=0 build locally for a while for another patch.
Note that there are important steps to take when updating ANGLE. See http://trac.webkit.org/wiki/UpdatingANGLE
Comment on attachment 380803 [details] Patch Never mind, there's probably a better build fix per feedback on the upstream ANGLE bug.
Created attachment 380806 [details] Patch
Comment on attachment 380806 [details] Patch This is the approach recommended by the ANGLE developers.
The commit-queue encountered the following flaky tests while processing attachment 380806 [details]: fetch/fetch-worker-crash.html bug 187257 (author: youennf@gmail.com) The commit-queue is continuing to process your patch.
Comment on attachment 380806 [details] Patch Clearing flags on attachment: 380806 Committed r251037: <https://trac.webkit.org/changeset/251037>
All reviewed patches have been landed. Closing bug.
<rdar://problem/56308615>