There is still code that checks the implicit flag when serializing instead of checking against initial values. Need to check against initial values instead.
<rdar://problem/104353481>
Pull request: https://github.com/WebKit/WebKit/pull/8925
Committed 259185@main (2e779d5aabd5): <https://commits.webkit.org/259185@main> Reviewed commits have been landed. Closing PR #8925 and removing active labels.