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

Revert of Revert of [Telemetry] Set the number of attempts to retry a test if browser or tab crash to 1 (patchset #1 id:1 of https://codereview.chromium.org/661303002/)

Reason for revert:
The removal of Telemetry's retry logic wasn't the cause of the intermittent crashes on the GPU bots.

Original issue's description:
> Revert of [Telemetry] Set the number of attempts to retry a test if browser or tab crash to 1 (patchset #2 id:20001 of https://codereview.chromium.org/659753003/)
>
> Reason for revert:
> Possible cause of gpu telemetry bot flake
>
> Original issue's description:
> > [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}
>
> TBR=tonyg@chromium.org,dtu@chromium.org,nednguyen@google.com
> NOTREECHECKS=true
> NOTRY=true
> BUG=422339
>
> Committed: https://crrev.com/1c141bedc45cdef1ac7b7264ea1288c33e33d106
> Cr-Commit-Position: refs/heads/master@{#300218}

TBR=tonyg@chromium.org,dtu@chromium.org,nednguyen@google.com,hendrikw@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=422339
Committed: https://crrev.com/89b463ddd92b4c9abe7898506ccb4935cef75d1e
Cr-Commit-Position: refs/heads/master@{#300225}

[Ken Russell (switch to Gerrit), 2014-10-19 14:30:43]

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