LayoutTests/webrtc/video-sframe.html is flaky on bots
<rdar://problem/72234800>
Created attachment 416150 [details] Patch
Committed r270799: <https://trac.webkit.org/changeset/270799> All reviewed patches have been landed. Closing bug and clearing flags on attachment 416150 [details].
*** Bug 219800 has been marked as a duplicate of this bug. ***