Adopt AVKit's AVSimplePlayerLayerView change for PiP.
rdar://problem/21928170
Created attachment 257246 [details] Patch
Created attachment 257249 [details] Patch
Created attachment 257285 [details] Patch
Comment on attachment 257285 [details] Patch Clearing flags on attachment: 257285 Committed r187181: <http://trac.webkit.org/changeset/187181>
All reviewed patches have been landed. Closing bug.