Add a perf test that PingPongs tasks between two threads.

Change-Id: I8b0a3907d9009d50e9b624e1eb299f90bc87a14d
Reviewed-on: https://chromium-review.googlesource.com/c/1414898
Commit-Queue: Alex Clarke <alexclarke@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623643}
1 file changed