If you go to http://www.cnn.com/videos/health/2016/06/01/autism-vaccines-young-scientist-facebook-jnd-orig-vstan.cnn a video will play, after an ad, and the inline media controls will show without the picture-in-picture or fullscreen buttons.
<rdar://problem/24175161>
Created attachment 281299 [details] Patch
Comment on attachment 281299 [details] Patch We really need tests.
Comment on attachment 281299 [details] Patch Clearing flags on attachment: 281299 Committed r202075: <http://trac.webkit.org/changeset/202075>
All reviewed patches have been landed. Closing bug.