Revert of Disable two tests in mojo_system_unittests that are suspected to be timing out

Revert of Disable two tests in mojo_system_unittests that are suspected to be timing out (patchset #2 id:20001 of https://codereview.chromium.org/2497203002/ )

Reason for revert:
Issue 663998 still persists after this CL.

Original issue's description:
> Disable two tests in mojo_system_unittests that are suspected to be timing out
>
> BUG=663998
> TBR=pdr@chromium.org, timloh@chromium.org
>
> Committed: https://crrev.com/aae520affa1d2c4397bf4d4758a9ff48d5a0cc88
> Cr-Commit-Position: refs/heads/master@{#431847}

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=663998
Committed: https://crrev.com/ba86cdb48c680aa78a142dee329d1c57ba22b00a
Cr-Commit-Position: refs/heads/master@{#432117}

[hiroshige, 2016-11-15 05:37:55]

The CQ bit was checked by hiroshige@chromium.org

[hiroshige, 2016-11-15 05:37:55]

Created Revert of Disable two tests in mojo_system_unittests that are suspected
to be timing out

[commit-bot: I haz the power, 2016-11-15 05:38:08]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-15 05:39:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-15 05:42:43]

Description was changed from

==========
Revert of Disable two tests in mojo_system_unittests that are suspected to be
timing out (patchset #2 id:20001 of https://codereview.chromium.org/2497203002/
)

Reason for revert:
Issue 663998 still persists after this CL.

Original issue's description:
> Disable two tests in mojo_system_unittests that are suspected to be timing out
> 
> BUG=663998
> TBR=pdr@chromium.org, timloh@chromium.org
> 
> Committed: https://crrev.com/aae520affa1d2c4397bf4d4758a9ff48d5a0cc88
> Cr-Commit-Position: refs/heads/master@{#431847}

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=663998
==========

to

==========
Revert of Disable two tests in mojo_system_unittests that are suspected to be
timing out (patchset #2 id:20001 of https://codereview.chromium.org/2497203002/
)

Reason for revert:
Issue 663998 still persists after this CL.

Original issue's description:
> Disable two tests in mojo_system_unittests that are suspected to be timing out
>
> BUG=663998
> TBR=pdr@chromium.org, timloh@chromium.org
>
> Committed: https://crrev.com/aae520affa1d2c4397bf4d4758a9ff48d5a0cc88
> Cr-Commit-Position: refs/heads/master@{#431847}

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=663998

Committed: https://crrev.com/ba86cdb48c680aa78a142dee329d1c57ba22b00a
Cr-Commit-Position: refs/heads/master@{#432117}
==========

[commit-bot: I haz the power, 2016-11-15 05:42:44]

Patchset 1 (id:??) landed as
https://crrev.com/ba86cdb48c680aa78a142dee329d1c57ba22b00a
Cr-Commit-Position: refs/heads/master@{#432117}