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}