The CSS WG would prefer to hold shipping of this feature while some details of the specification are worked out. To avoid accidentally shipping before consensus is reached, let's flip the flags off. We will continue to enable it in STP builds.
<rdar://problem/104979142>
Pull request: https://github.com/Webkit/WebKit/pull/9558
Committed 259787@main (fc1e58ebbeac): <https://commits.webkit.org/259787@main> Reviewed commits have been landed. Closing PR #9558 and removing active labels.