Revert of Run telemetry_perf_unittests via isolate on "Mac tests", "Linux tests" and trybot with swarming.

Revert of Run telemetry_perf_unittests via isolate on "Mac tests", "Linux tests" and trybot with swarming. (patchset #2 id:20001 of https://codereview.chromium.org/1419143006/ )

Reason for revert:
speculative revert to see if it's the cause of massive benchmarks.benchmark_smoke_unittest failures on  Mac10.9 Tests (dbg)

Original issue's description:
> Run telemetry_perf_unittests via isolate on "Mac tests", "Linux tests" and trybot with swarming.
>
> Swarming on Mac 10.9 is disabled temporarily because of
> crbug.com/551405 (patch 2)
>
> Swarmed telemetry_perf_unittest passed on Mac 10.6, 10.8:
>
> http://build.chromium.org/p/chromium.mac/builders/Mac10.6%20Tests/builds/8616/steps/telemetry_perf_unittests%20on%20Mac-10.6/logs/stdio
>
> http://build.chromium.org/p/chromium.mac/builders/Mac10.8%20Tests/builds/10641/steps/telemetry_perf_unittests/logs/stdio
>
> This is a reland of https://codereview.chromium.org/1412333004/.
>
> Committed: https://crrev.com/3b8e8ebdd60de034d880ad05915b598a0594d7f4
> Cr-Commit-Position: refs/heads/master@{#357848}

TBR=phajdan.jr@chromium.org,maruel@chromium.org,thakis@chromium.org,mostynb@opera.com,nednguyen@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/1f548985bfeaacd0aa4b782c629d1ecbc29173c7
Cr-Commit-Position: refs/heads/master@{#358046}

[cschuet (SLOW), 2015-11-05 13:37:52]

Created Revert of Run telemetry_perf_unittests via isolate on "Mac tests",
"Linux tests" and trybot with swarming.