Move to modern WebKit over WebKitLegacy.
Pull request: https://github.com/webkit/webkit/pull/1073
Pull request: https://github.com/WebKit/WebKit/pull/1073
Committed 257567@main (c6cd67212496): <https://commits.webkit.org/257567@main> Reviewed commits have been landed. Closing PR #1073 and removing active labels.
<rdar://problem/103119497>