Clean up PermissionContextBaseTests code.

Clean up PermissionContextBaseTests code.

Fix crashes when running with --single-process-tests

BUG=650828
Committed: https://crrev.com/9bdf7f221dcf693eebce8c57567314e058368c36
Cr-Commit-Position: refs/heads/master@{#421404}

[Lei Zhang, 2016-09-27 21:20:59]

Description was changed from

==========
Clean up PermissionContextBaseTests code.

Fix crashes when running with --single-process-tests
==========

to

==========
Clean up PermissionContextBaseTests code.

Fix crashes when running with --single-process-tests

BUG=650828
==========

[Lei Zhang, 2016-09-27 21:55:33]

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

[commit-bot: I haz the power, 2016-09-27 21:55:53]

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

[Lei Zhang, 2016-09-27 21:59:04]

thestig@chromium.org changed reviewers:
+ dominickn@chromium.org

[commit-bot: I haz the power, 2016-09-27 22:38:19]

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

[commit-bot: I haz the power, 2016-09-27 22:38:20]

Dry run: This issue passed the CQ dry run.

[dominickn, 2016-09-28 00:50:09]

lgtm, thanks!

[Lei Zhang, 2016-09-28 00:50:35]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2016-09-28 00:50:51]

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, 2016-09-28 00:56:41]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-09-28 00:59:03]

Description was changed from

==========
Clean up PermissionContextBaseTests code.

Fix crashes when running with --single-process-tests

BUG=650828
==========

to

==========
Clean up PermissionContextBaseTests code.

Fix crashes when running with --single-process-tests

BUG=650828

Committed: https://crrev.com/9bdf7f221dcf693eebce8c57567314e058368c36
Cr-Commit-Position: refs/heads/master@{#421404}
==========

[commit-bot: I haz the power, 2016-09-28 00:59:04]

Patchset 4 (id:??) landed as
https://crrev.com/9bdf7f221dcf693eebce8c57567314e058368c36
Cr-Commit-Position: refs/heads/master@{#421404}