Because WebKit doesn't implement CEReactions, most CEReaction attribute in IDL files are not needed. Make this more explicit by making each CEReaction attribute take the value of Needed or NotNeeded.
Pull request: https://github.com/WebKit/WebKit/pull/13424
Committed 263729@main (f93732930723): <https://commits.webkit.org/263729@main> Reviewed commits have been landed. Closing PR #13424 and removing active labels.
<rdar://problem/108958572>