WebKit should not depend on CA's implicit auto-upgrade to extendedSRGB
<rdar://problem/101695786>
Pull request: https://github.com/WebKit/WebKit/pull/5927
Committed 256361@main (831c68acbcc6): <https://commits.webkit.org/256361@main> Reviewed commits have been landed. Closing PR #5927 and removing active labels.