DedicatedWorkerGlobalScope should clear m_rtcRtpTransformerConstructorMap before destructor.
<rdar://problem/71820835>
Created attachment 415106 [details] Patch
Created attachment 415107 [details] Patch
Committed r270303: <https://trac.webkit.org/changeset/270303> All reviewed patches have been landed. Closing bug and clearing flags on attachment 415107 [details].