Tommi 25c77c1aea Add SharedModuleThread class to share a module thread across Call instances.
This reduces the number of threads allocated per PeerConnection when
more than one PC is needed.

Bug: webrtc:11598
Change-Id: I3c1fd71705f90c4b4bbb1bc3f0f659c94016e69a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175904
Commit-Queue: Tommi <tommi@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31347}
2020-05-25 17:21:56 +00:00
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