Remove now-unneded HAVE(WINDOW_SERVER_OCCLUSION_NOTIFICATIONS)
Created attachment 398369 [details] Patch
Created attachment 398376 [details] Patch
Committed r261098: <https://trac.webkit.org/changeset/261098> All reviewed patches have been landed. Closing bug and clearing flags on attachment 398376 [details].
<rdar://problem/62856016>