Add comment to clarify what the mock action in the test does.

Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

BUG=629945, 640579
Committed: https://crrev.com/eb9681e84dffcad3042407c86aa4768e6f321cee
Cr-Commit-Position: refs/heads/master@{#414298}

[yamaguchi, 2016-08-25 02:06:23]

yamaguchi@chromium.org changed reviewers:
+ satorux@chromium.org

[satorux1, 2016-08-25 02:22:46]

lgtm. please add the bug number to BUG=

[yamaguchi, 2016-08-25 02:28:45]

Description was changed from

==========
Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

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

to

==========
Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

BUG=629945, 640579
==========

[yamaguchi, 2016-08-25 02:28:48]

The CQ bit was checked by yamaguchi@chromium.org

[commit-bot: I haz the power, 2016-08-25 02:29:50]

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, 2016-08-25 03:50:12]

Description was changed from

==========
Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

BUG=629945, 640579
==========

to

==========
Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

BUG=629945, 640579
==========

[commit-bot: I haz the power, 2016-08-25 03:50:12]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-25 03:53:55]

Description was changed from

==========
Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

BUG=629945, 640579
==========

to

==========
Add comment to clarify what the mock action in the test does.
This is a follow-up of Issue 2230713003.

BUG=629945, 640579

Committed: https://crrev.com/eb9681e84dffcad3042407c86aa4768e6f321cee
Cr-Commit-Position: refs/heads/master@{#414298}
==========

[commit-bot: I haz the power, 2016-08-25 03:53:56]

Patchset 2 (id:??) landed as
https://crrev.com/eb9681e84dffcad3042407c86aa4768e6f321cee
Cr-Commit-Position: refs/heads/master@{#414298}