That would allow us to deal with common messages from more call sites, allowing custom handlers as well. For now I'll propose this mostly fro the AudioDestination.
Dank Farrik. The message handler is still needed there.
Created attachment 450245 [details]
Committed r288948 (246677@main): <https://commits.webkit.org/246677@main>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 450245 [details].