The texture mapper doesn't really need to know what edges are exposed, only whether all of them are or not, so we can simplify everything by using a bool enum instead.
Pull request: https://github.com/WebKit/WebKit/pull/19832
Committed 270105@main (983db64d2b00): <https://commits.webkit.org/270105@main> Reviewed commits have been landed. Closing PR #19832 and removing active labels.
<rdar://problem/117845527>