TriState should be an enum class and use "Indeterminate" instead of "Mixed"
Created attachment 398142 [details] Patch
Comment on attachment 398142 [details] Patch r=me
Created attachment 398144 [details] Patch
(In reply to Mark Lam from comment #2) > Comment on attachment 398142 [details] > Patch > > r=me Oops, didn't see this! Will reupload without the r?.
Created attachment 398145 [details] Patch for landing
Created attachment 398149 [details] Patch for landing
Created attachment 398154 [details] Patch for landing
Committed r260984: <https://trac.webkit.org/changeset/260984> All reviewed patches have been landed. Closing bug and clearing flags on attachment 398154 [details].
<rdar://problem/62703576>