Add a bit more UIHitTesting logging, and make it possible to dump EventRegions from WebKit
Created attachment 393496 [details] Patch
Created attachment 393720 [details] Patch
Comment on attachment 393720 [details] Patch Clearing flags on attachment: 393720 Committed r258539: <https://trac.webkit.org/changeset/258539>
<rdar://problem/60546680>