We need to not return a NULL result to the -effectiveAppearanceForScrollerImp: delegate.
<rdar://problem/48419124>
Created attachment 363058 [details] Patch
Comment on attachment 363058 [details] Patch Clearing flags on attachment: 363058 Committed r242128: <https://trac.webkit.org/changeset/242128>
All reviewed patches have been landed. Closing bug.