Re-enable PolicyTest.SessionLengthLimit.

Re-enable PolicyTest.SessionLengthLimit.

Ran it 60+ times, didn't fail once.

BUG=315308
Committed: https://crrev.com/af1ca270836fb9c1f9f25bc6d6f6332820268edc
Cr-Commit-Position: refs/heads/master@{#356970}

[achuithb, 2015-10-16 21:44:18]

The CQ bit was checked by achuith@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-10-16 21:44:55]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1408003006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1408003006/1

[achuithb, 2015-10-16 21:45:14]

achuith@chromium.org changed reviewers:
+ cschuet@chromium.org

[achuithb, 2015-10-16 21:45:14]

Chris, please take a look.

[commit-bot: I haz the power, 2015-10-16 22:21:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-10-16 22:21:53]

Dry run: This issue passed the CQ dry run.

[cschuet (SLOW), 2015-10-17 10:00:25]

On 2015/10/16 22:21:53, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

Achuith,
same here. What has fixed the test flakiness?

[achuithb, 2015-10-27 17:19:28]

On 2015/10/17 10:00:25, cschuet wrote:
> On 2015/10/16 22:21:53, commit-bot: I haz the power wrote:
> > Dry run: This issue passed the CQ dry run.
> 
> Achuith,
> same here. What has fixed the test flakiness?

Not sure if you saw this comment in the tracking bug, Christoph:
https://code.google.com/p/chromium/issues/detail?id=315308#c25

[cschuet (SLOW), 2015-10-28 05:53:02]

On 2015/10/27 17:19:28, achuithb wrote:
> On 2015/10/17 10:00:25, cschuet wrote:
> > On 2015/10/16 22:21:53, commit-bot: I haz the power wrote:
> > > Dry run: This issue passed the CQ dry run.
> > 
> > Achuith,
> > same here. What has fixed the test flakiness?
> 
> Not sure if you saw this comment in the tracking bug, Christoph:
> https://code.google.com/p/chromium/issues/detail?id=315308#c25

I didn't. Thanks again for looking into this. I'd agree, let's reenable these
tests as we can always disable them again due to flakiness.

LGTM

[achuithb, 2015-10-29 22:05:47]

The CQ bit was checked by achuith@chromium.org

[achuithb, 2015-10-29 22:06:24]

On 2015/10/28 05:53:02, cschuet wrote:
> On 2015/10/27 17:19:28, achuithb wrote:
> > On 2015/10/17 10:00:25, cschuet wrote:
> > > On 2015/10/16 22:21:53, commit-bot: I haz the power wrote:
> > > > Dry run: This issue passed the CQ dry run.
> > > 
> > > Achuith,
> > > same here. What has fixed the test flakiness?
> > 
> > Not sure if you saw this comment in the tracking bug, Christoph:
> > https://code.google.com/p/chromium/issues/detail?id=315308#c25
> 
> I didn't. Thanks again for looking into this. I'd agree, let's reenable these
> tests as we can always disable them again due to flakiness.
> 
> LGTM

Thanks Christoph!

[commit-bot: I haz the power, 2015-10-29 22:07:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1408003006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1408003006/1

[commit-bot: I haz the power, 2015-10-29 22:53:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-29 22:54:22]

Patchset 1 (id:??) landed as
https://crrev.com/af1ca270836fb9c1f9f25bc6d6f6332820268edc
Cr-Commit-Position: refs/heads/master@{#356970}