[WK1][iOS] VideoFullscreenControllerContext uses UIKit off the main thread
<rdar://problem/48742782>
Created attachment 387587 [details] Patch
Comment on attachment 387587 [details] Patch Clearing flags on attachment: 387587 Committed r254490: <https://trac.webkit.org/changeset/254490>
All reviewed patches have been landed. Closing bug.