Currently, it starts observing when RealtimeOutgoingAudioSource is finished constructing but the final class might not be.
Created attachment 353822 [details] Patch
Comment on attachment 353822 [details] Patch Clearing flags on attachment: 353822 Committed r237802: <https://trac.webkit.org/changeset/237802>
All reviewed patches have been landed. Closing bug.
<rdar://problem/45806966>