Remove EAffinity, UPSTREAM, DOWNSTREAM, SEL_DEFAULT_AFFINITY, and VisibleSelection::selectionType
Created attachment 407842 [details] Patch
Created attachment 407844 [details] Patch
Created attachment 407862 [details] Patch
Looks like tests are passing, ready for review.
Committed r266557: <https://trac.webkit.org/changeset/266557>
<rdar://problem/68302564>