Revert of Revert of Revert of Enable telemetry unittests on Mac 10.9

Revert of Revert of Revert of Enable telemetry unittests on Mac 10.9 (patchset #1 id:1 of https://codereview.chromium.org/789233002/)

Reason for revert:
Telemetry tests still fails.

Original issue's description:
> Revert of Revert of Enable telemetry unittests on Mac 10.9 (patchset #1 id:1 of https://codereview.chromium.org/792683002/)
>
> Reason for revert:
> The failing test was disabled in https://codereview.chromium.org/789043003
>
> Original issue's description:
> > Revert of Enable telemetry unittests on Mac 10.9 (patchset #1 id:1 of https://codereview.chromium.org/779943004/)
> >
> > Reason for revert:
> > Tests fail with a different error.
> >
> > Original issue's description:
> > > Enable telemetry unittests on Mac 10.9
> > >
> > > The tests were fixed in https://codereview.chromium.org/789853003
> > >
> > > BUG=423688
> > >
> > > Committed: https://crrev.com/e0fe19f3e05e83e820be8a8e2850853bc0434b21
> > > Cr-Commit-Position: refs/heads/master@{#307522}
> >
> > TBR=tonyg@chromium.org,phajdan.jr@chromium.org
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=423688
> >
> > Committed: https://crrev.com/dbf34f1e5d36e433c9d30df974da8c5f6fa665e5
> > Cr-Commit-Position: refs/heads/master@{#307553}
>
> TBR=tonyg@chromium.org,phajdan.jr@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=423688
>
> Committed: https://crrev.com/1e2366706b52428a3a6355864b6e9a845216ae3d
> Cr-Commit-Position: refs/heads/master@{#307696}

TBR=tonyg@chromium.org,phajdan.jr@chromium.org,sullivan@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=423688
Committed: https://crrev.com/79b9048ef6ddf1278beef8fac69536798f6d3963
Cr-Commit-Position: refs/heads/master@{#307734}

[dvh, 2014-12-10 18:10:57]

Created Revert of Revert of Revert of Enable telemetry unittests on Mac 10.9

[commit-bot: I haz the power, 2014-12-10 18:12:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/788263002/1

[commit-bot: I haz the power, 2014-12-10 18:13:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-10 18:14:09]

Patchset 1 (id:??) landed as
https://crrev.com/79b9048ef6ddf1278beef8fac69536798f6d3963
Cr-Commit-Position: refs/heads/master@{#307734}

[sullivan, 2014-12-10 20:38:25]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/775363003/ by sullivan@chromium.org.

The reason for reverting is: Failing test disabled in
https://codereview.chromium.org/790253002/.