Sometimes, a task bound to VideoSendStreamTest was called
after the underlying object had been destructed:
1. |test| goes out of scope.
2. There might still have been a task in fixture's queue,
setup by OnSendRtp (capturing [this]) and invoked before
the destruction of the fixture.
This CL uses the same workaround than BandwidthStatsTest:
block until all posted tasks are processed.
This fixes the following flaky tests:
* VideoSendStreamTest.ChangingNetworkRoute
* VideoSendStreamTest.RespectsMinTransmitBitrate*
Bug: webrtc:11156
Change-Id: I229c96d2abbbb60b43e9d9f62ad112507a21fe48
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/163984
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Yves Gerey <yvesg@google.com>
Cr-Commit-Position: refs/heads/master@{#30152}
c33e4910c5