Ilya Nikolaevskiy 879f5a34a5 Add test against crashes in VideoQualityObserver
If there were a lot of pauses in the receive video stream, it may've
caused a crash because of a null rtc::Optional dereferencing.

This is the test reproducing that behaviour.

Bug: webrtc:9338
Change-Id: I1cef72a88a54f762ef27665d372e4a1d1225e059
Reviewed-on: https://webrtc-review.googlesource.com/80161
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23470}
2018-05-31 12:32:37 +00:00
..
2018-01-17 13:27:47 +00:00
2018-05-08 16:03:53 +00:00