The test relies on the ability to run a thread for a controllable duration of time, which is unreliable on instrumented builds (TSan, etc.). Also adding a minimal test which can still be run on instrumented builds, so they at least still exercise the code. BUG=webrtc:7542 TBR=kjellander@webrtc.org Review-Url: https://codereview.webrtc.org/2856473002 Cr-Commit-Position: refs/heads/master@{#17961}