RealtimeMediaSource should be ThreadSafeRefCounted
Crash log obtained when reloading very often a web page showed the issue.
Created attachment 331337 [details] Patch
<rdar://problem/36522768>
Comment on attachment 331337 [details] Patch Clearing flags on attachment: 331337 Committed r226951: <https://trac.webkit.org/changeset/226951>
All reviewed patches have been landed. Closing bug.