Enable declarative Shadow DOM by default.
Pull request: https://github.com/WebKit/WebKit/pull/7798
Committed 258566@main (36f99b7c3667): <https://commits.webkit.org/258566@main>
Reviewed commits have been landed. Closing PR #7798 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/8324
Committed 258568@main (e7d5dde46795): <https://commits.webkit.org/258568@main>
Reviewed commits have been landed. Closing PR #8324 and removing active labels.
Relanded in https://commits.webkit.org/258967@main