We prefer to use enum classes whenever we can and there are instances in the render tree flexbox code where these adjustments can be made
<rdar://problem/109745776>
Pull request: https://github.com/WebKit/WebKit/pull/14297
Committed 264494@main (271ed0f956eb): <https://commits.webkit.org/264494@main> Reviewed commits have been landed. Closing PR #14297 and removing active labels.