We needed to update the RemoteMediaPlayerProxy::prepareForPlayback definition after that and MediaPlayerPrivateRemote::MediaPlayerPrivateRemote's constructor in MediaPlayerPrivateRemote.cpp was broken with RELEASE_LOG_DISABLE as it didn't have a colon for the first member initializer (as that was only in the !RELEASE_LOG_DISABLED block).
Created attachment 410032 [details] Patch
Committed r267768: <https://trac.webkit.org/changeset/267768> All reviewed patches have been landed. Closing bug and clearing flags on attachment 410032 [details].
<rdar://problem/69767711>