Add experimental "alphaChannel" property to VideoConfiguration
Created attachment 364943 [details] Patch
<rdar://problem/25834531>
Created attachment 364946 [details] Patch
Created attachment 364947 [details] Patch
Created attachment 364950 [details] Patch
Comment on attachment 364950 [details] Patch Clearing flags on attachment: 364950 Committed r243109: <https://trac.webkit.org/changeset/243109>
All reviewed patches have been landed. Closing bug.