[Mac] Set -contentsScale on AVPlayerLayer to allow AVPlayer to select the appropriate HLS variant.
<rdar://problem/19717591>
Created attachment 246202 [details] Patch
Comment on attachment 246202 [details] Patch Clearing flags on attachment: 246202 Committed r179784: <http://trac.webkit.org/changeset/179784>
All reviewed patches have been landed. Closing bug.