Fix some issues raised by Firefox devs on prefers-color-scheme in WebKit. https://github.com/w3c/csswg-drafts/issues/3278
<rdar://problem/46074307>
Created attachment 354849 [details] Patch
Comment on attachment 354849 [details] Patch Clearing flags on attachment: 354849 Committed r238200: <https://trac.webkit.org/changeset/238200>
All reviewed patches have been landed. Closing bug.