Forward declare MediaKeys/MediaKeySession in Internals.h
Created attachment 401425 [details] Patch
Comment on attachment 401425 [details] Patch How on earth? :) Maybe I was putting it in the wrong namespace when class forwarding...
Committed r262794: <https://trac.webkit.org/changeset/262794> All reviewed patches have been landed. Closing bug and clearing flags on attachment 401425 [details].
<rdar://problem/64165616>