[Telemetry] Set the number of attempts to retry a test if browser or tab crash to 1

[Telemetry] Set the number of attempts to retry a test to 1

**SHERIFFS: if telemetry perf tests on waterfall become more flaky, this patch can be safely reverted.

BUG=422339
Committed: https://crrev.com/f5b75f261be7779ccca14d09ddaabb3e4ee5ee03
Cr-Commit-Position: refs/heads/master@{#299716}

[nednguyen, 2014-10-15 15:45:50]

nednguyen@google.com changed reviewers:
+ dtu@chromium.org, tonyg@chromium.org

[tonyg, 2014-10-15 15:51:22]

lgtm!!

I do wonder whether it's worth a note in the patch description to sheriffs so
that this patch might catch their attention if things become flaky.

[nednguyen, 2014-10-15 15:54:00]

On 2014/10/15 15:51:22, tonyg wrote:
> lgtm!!
> 
> I do wonder whether it's worth a note in the patch description to sheriffs so
> that this patch might catch their attention if things become flaky.

Definitely!

[nednguyen, 2014-10-15 15:55:31]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2014-10-15 15:56:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/659753003/1

[nednguyen, 2014-10-15 15:59:41]

The CQ bit was checked by nednguyen@google.com

[commit-bot: I haz the power, 2014-10-15 15:59:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/659753003/20001

[commit-bot: I haz the power, 2014-10-15 18:13:06]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-15 18:13:58]

Patchset 2 (id:??) landed as
https://crrev.com/f5b75f261be7779ccca14d09ddaabb3e4ee5ee03
Cr-Commit-Position: refs/heads/master@{#299716}

[hendrikw, 2014-10-18 19:58:17]

On 2014/10/15 18:13:58, I haz the power (commit-bot) wrote:
> Patchset 2 (id:??) landed as
> https://crrev.com/f5b75f261be7779ccca14d09ddaabb3e4ee5ee03
> Cr-Commit-Position: refs/heads/master@{#299716}

I'm almost sure that this is the cause of a bunch of our gpu bots woes.

I wasn't able to repro the bot issues when reverting this locally.

Reverting.

If this doesn't fix our bots, I'll revert the revert.  Sorry.

Please see https://code.google.com/p/chromium/issues/detail?id=424024 for more
details.

[hendrikw, 2014-10-18 19:58:52]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/661303002/ by hendrikw@chromium.org.

The reason for reverting is: Possible cause of gpu telemetry bot flake.