[Cocoa] Fix build after 6c7943f6c9bc009014a5bfbbf96adf05a3414eaa
<rdar://problem/101401037>
Pull request: https://github.com/WebKit/WebKit/pull/5604
Committed 255805@main (f1b61d5ae01b): <https://commits.webkit.org/255805@main> Reviewed commits have been landed. Closing PR #5604 and removing active labels.
Re-opened since this is blocked by bug 246867
Pull request: https://github.com/WebKit/WebKit/pull/5675
Committed 255881@main (1dee534b8545): <https://commits.webkit.org/255881@main> Reviewed commits have been landed. Closing PR #5675 and removing active labels.