Clean up ca_layer_tree_unittest_mac.mm.

Clean up ca_layer_tree_unittest_mac.mm.

This CL is a refactor and has no intended behavior change.

BUG=

Committed: https://crrev.com/8ff06aa4bbd93d9eff4d481ba870329d34abdd1a
Cr-Commit-Position: refs/heads/master@{#390288}

[erikchen, 2016-04-28 02:12:45]

erikchen@chromium.org changed reviewers:
+ ccameron@chromium.org

[erikchen, 2016-04-28 02:12:46]

ccameron: Please review.

[erikchen, 2016-04-28 02:13:30]

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

[commit-bot: I haz the power, 2016-04-28 02:13:40]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1924963003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1924963003/20001

[commit-bot: I haz the power, 2016-04-28 03:15:26]

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

[commit-bot: I haz the power, 2016-04-28 03:15:27]

Dry run: This issue passed the CQ dry run.

[ccameron, 2016-04-28 03:25:52]

lgtm, thanks for doing this

[ccameron, 2016-04-28 03:25:58]

The CQ bit was checked by ccameron@chromium.org

[commit-bot: I haz the power, 2016-04-28 03:26:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1924963003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1924963003/20001

[ccameron, 2016-04-28 03:26:15]

putting in the cq so i can land on top of it.

[commit-bot: I haz the power, 2016-04-28 03:29:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-30 17:15:54]

Patchset 2 (id:??) landed as
https://crrev.com/8ff06aa4bbd93d9eff4d481ba870329d34abdd1a
Cr-Commit-Position: refs/heads/master@{#390288}

[commit-bot: I haz the power, 2016-04-30 17:53:59]

Description was changed from

==========
Clean up ca_layer_tree_unittest_mac.mm.

This CL is a refactor and has no intended behavior change.

BUG=
==========

to

==========
Clean up ca_layer_tree_unittest_mac.mm.

This CL is a refactor and has no intended behavior change.

BUG=

Committed: https://crrev.com/8ff06aa4bbd93d9eff4d481ba870329d34abdd1a
Cr-Commit-Position: refs/heads/master@{#390288}
==========