We need a new runtime flag to gate our implementation of Scroll-driven Animations (see bug 222295).
Pull request: https://github.com/WebKit/WebKit/pull/20040
Committed 270282@main (40f1e1df84da): <https://commits.webkit.org/270282@main> Reviewed commits have been landed. Closing PR #20040 and removing active labels.
<rdar://problem/118012895>