Delete MessageViews cleared by "Clear All" after animation.

Delete MessageViews cleared by "Clear All" after animation.

BUG=719336
TEST=Added unittests in message_center_unittests.

Review-Url: https://codereview.chromium.org/2868793002
Cr-Commit-Position: refs/heads/master@{#469955}
Committed: https://chromium.googlesource.com/chromium/src/+/051bc03146abba0fa2f15331e8ea04e0d3d98d92

[yhanada, 2017-05-08 07:26:32]

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

[yhanada, 2017-05-08 07:26:58]

yhanada@chromium.org changed reviewers:
+ yoshiki@chromium.org

[yhanada, 2017-05-08 07:26:58]

PTAL. Thanks!

[commit-bot: I haz the power, 2017-05-08 07:27:16]

Dry run: 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, 2017-05-08 09:07:05]

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

[commit-bot: I haz the power, 2017-05-08 09:07:06]

Dry run: This issue passed the CQ dry run.

[yoshiki, 2017-05-08 10:41:05]

LGTM. Thanks!

[yhanada, 2017-05-08 10:42:50]

The CQ bit was checked by yhanada@chromium.org

[commit-bot: I haz the power, 2017-05-08 10:43:10]

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, 2017-05-08 10:47:54]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494240170889760, "parent_rev":
"c0f2d73db929c46c1dd9fc14e627a0f7d39469c1", "commit_rev":
"051bc03146abba0fa2f15331e8ea04e0d3d98d92"}

[commit-bot: I haz the power, 2017-05-08 10:48:01]

Description was changed from

==========
Delete MessageViews cleared by "Clear All" after animation.

BUG=719336
TEST=Added unittests in message_center_unittests.
==========

to

==========
Delete MessageViews cleared by "Clear All" after animation.

BUG=719336
TEST=Added unittests in message_center_unittests.

Review-Url: https://codereview.chromium.org/2868793002
Cr-Commit-Position: refs/heads/master@{#469955}
Committed:
https://chromium.googlesource.com/chromium/src/+/051bc03146abba0fa2f15331e8ea...
==========

[commit-bot: I haz the power, 2017-05-08 10:48:02]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/051bc03146abba0fa2f15331e8ea...