Revert of Add logs to debug a flakiness on GPU Mac bots.

Revert of Add logs to debug a flakiness on GPU Mac bots. (patchset #2 id:20001 of https://codereview.chromium.org/684423005/)

Reason for revert:
Should turn on logging in telemetry_gpu_tests in general.

Original issue's description:
> Add logs to debug a flakiness on GPU Mac bots.
>
> This is temporary and will be removed after we pin down the issue.
>
> BUG=424024
> TEST=
> R=kbr@chromium.org
> TBR=dgozman@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/16aa242c3456dc68cd91ef2c683158799c8441b0
> Cr-Commit-Position: refs/heads/master@{#302371}

TBR=dgozman@chromium.org,kbr@chromium.org,pfeldman@chromium.org,yurys@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=424024
Committed: https://crrev.com/ec506e7f57922e5a068d76128f020877bc7986cb
Cr-Commit-Position: refs/heads/master@{#302387}

[Zhenyao Mo, 2014-11-01 16:21:46]

Created Revert of Add logs to debug a flakiness on GPU Mac bots.

[commit-bot: I haz the power, 2014-11-01 16:22:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/684253003/1

[commit-bot: I haz the power, 2014-11-01 16:22:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-01 16:23:37]

Patchset 1 (id:??) landed as
https://crrev.com/ec506e7f57922e5a068d76128f020877bc7986cb
Cr-Commit-Position: refs/heads/master@{#302387}

[Zhenyao Mo, 2014-11-01 16:24:52]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/698783002/ by zmo@chromium.org.

The reason for reverting is: Ah, reverted the wrong CL..