Revert of Disable telemetry tests for Mac 10.9.

Revert of Disable telemetry tests for Mac 10.9. (patchset #2 id:20001 of https://codereview.chromium.org/706703003/)

Reason for revert:
Re-enabling these tests. Hopefully this was fixed by https://codereview.chromium.org/703203004

Original issue's description:
> Disable telemetry tests for Mac 10.9.
>
> The telemetry tests are failing consistently on OSX 10.9.
>
> BUG=420615
> R=tonyg@chromium.org
>
> Committed: https://crrev.com/5503de1eeae0437c1f8160d69b04d6241bc5e974
> Cr-Commit-Position: refs/heads/master@{#303114}

TBR=phajdan.jr@chromium.org,tonyg@chromium.org,garykac@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=420615
Committed: https://crrev.com/4eb5e022f23d5e398df44bf191e27c3b2df19d6b
Cr-Commit-Position: refs/heads/master@{#303709}

[dtu, 2014-11-11 20:21:07]

Created Revert of Disable telemetry tests for Mac 10.9.

[commit-bot: I haz the power, 2014-11-11 20:21:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/718783002/1

[commit-bot: I haz the power, 2014-11-11 20:22:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-11 20:23:30]

Patchset 1 (id:??) landed as
https://crrev.com/4eb5e022f23d5e398df44bf191e27c3b2df19d6b
Cr-Commit-Position: refs/heads/master@{#303709}