telemetry, mac: Stop using the fake keychain for telemetry tests.

telemetry, mac: Stop using the fake keychain for telemetry tests.

The telemetry tests stopped using the real OSX keychain because the 10.9
machines were incorrectly configured. The 10.9 machines have had their
keychains fixed (Issue 397385). I've also added checks so that key Telemetry
tests log error messages if the OSX keychain is incorrectly configured
(http://code.google.com/p/chromium/issues/detail?id=443340#c3).

BUG=443340
Committed: https://crrev.com/6c0cdb70ade70eafb0503c1e223ac3e1b10af087
Cr-Commit-Position: refs/heads/master@{#315385}

[erikchen, 2015-02-07 00:26:56]

erikchen@chromium.org changed reviewers:
+ nednguyen@google.com

[erikchen, 2015-02-07 00:26:56]

nednguyen: Please review.

Before I land this CL, I will coordinate with the perf sheriffs.

[nednguyen, 2015-02-07 00:41:19]

lgtm

[erikchen, 2015-02-09 19:45:29]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2015-02-09 19:46:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/904163002/1

[commit-bot: I haz the power, 2015-02-09 20:52:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-09 21:00:16]

Patchset 1 (id:??) landed as
https://crrev.com/6c0cdb70ade70eafb0503c1e223ac3e1b10af087
Cr-Commit-Position: refs/heads/master@{#315385}