Steve Anton d91969ed79 Explicitly close PeerConnections when using ScopedFieldTrials
Since ScopedFieldTrials is not thread safe, if it goes out of
scope while other threads are still running and possibly querying
the field trials then it's possible to hit an MSAN failure.

Bug: webrtc:10694
Change-Id: I93c94f1008e4478d98ec1545bbc0a7536739e479
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/139460
Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28116}
2019-05-30 20:32:05 +00:00
..
2019-01-28 11:17:00 +00:00
2019-05-20 18:38:06 +00:00