[Cocoa] Notify AVSystemController of our presenting PID before registering as a Now Playing app.
Created attachment 361692 [details] Patch
<rdar://problem/47969451>
Created attachment 361693 [details] Patch
Comment on attachment 361693 [details] Patch r=me once the bots are happy
Created attachment 361697 [details] Patch for landing
Created attachment 361704 [details] Patch for landing
Comment on attachment 361704 [details] Patch for landing Clearing flags on attachment: 361704 Committed r241281: <https://trac.webkit.org/changeset/241281>
All reviewed patches have been landed. Closing bug.