Revert of Disable tests failing under Dr. Memory

Revert of Disable tests failing under Dr. Memory (patchset #1 id:1 of https://codereview.chromium.org/2043123002/ )

Reason for revert:
The change that added this test has seen been reverted.

Original issue's description:
> Disable tests failing under Dr. Memory
>
> ServiceWorkerProviderHostTest.ContextSecurity
>
> BUG=618015
> TBR=oshima@chromium.org
>
> Committed: https://chromium.googlesource.com/chromium/src/+/6bfb23934a9ba482fc12f5d2628a253f40422ff4

TBR=oshima@chromium.org,reillyg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=618015
Committed: https://crrev.com/e6a56d552c00fd8d7020f0abd019e990838ac687
Cr-Commit-Position: refs/heads/master@{#399652}

[falken, 2016-06-14 05:00:02]

The CQ bit was checked by falken@chromium.org

[falken, 2016-06-14 05:00:03]

Created Revert of Disable tests failing under Dr. Memory

[commit-bot: I haz the power, 2016-06-14 05:00:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2064983002/1

[commit-bot: I haz the power, 2016-06-14 06:30:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-14 06:33:38]

Description was changed from

==========
Revert of Disable tests failing under Dr. Memory (patchset #1 id:1 of
https://codereview.chromium.org/2043123002/ )

Reason for revert:
The change that added this test has seen been reverted.

Original issue's description:
> Disable tests failing under Dr. Memory
> 
> ServiceWorkerProviderHostTest.ContextSecurity
> 
> BUG=618015
> TBR=oshima@chromium.org
> 
> Committed:
https://chromium.googlesource.com/chromium/src/+/6bfb23934a9ba482fc12f5d2628a...

TBR=oshima@chromium.org,reillyg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=618015
==========

to

==========
Revert of Disable tests failing under Dr. Memory (patchset #1 id:1 of
https://codereview.chromium.org/2043123002/ )

Reason for revert:
The change that added this test has seen been reverted.

Original issue's description:
> Disable tests failing under Dr. Memory
>
> ServiceWorkerProviderHostTest.ContextSecurity
>
> BUG=618015
> TBR=oshima@chromium.org
>
> Committed:
https://chromium.googlesource.com/chromium/src/+/6bfb23934a9ba482fc12f5d2628a...

TBR=oshima@chromium.org,reillyg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=618015

Committed: https://crrev.com/e6a56d552c00fd8d7020f0abd019e990838ac687
Cr-Commit-Position: refs/heads/master@{#399652}
==========

[commit-bot: I haz the power, 2016-06-14 06:33:39]

Patchset 1 (id:??) landed as
https://crrev.com/e6a56d552c00fd8d7020f0abd019e990838ac687
Cr-Commit-Position: refs/heads/master@{#399652}