Retires scoped_ptr for BoundsAnimator of message_list_view.

Retires scoped_ptr for BoundsAnimator of message_list_view.

It's now quite complicated for the animation status in the
message_list_view. I think it's a bit better to get rid of
scoped_ptr and hold BoundsAnimator as a normal field.

BUG=None
R=dewittj@chromium.org, yoshiki@chromium.org
TEST=None

Committed: https://crrev.com/e0096ef8707579fd6507e3e228df0c0c3afc8df8
Cr-Commit-Position: refs/heads/master@{#346413}

[yoshiki, 2015-06-16 05:58:33]

Thank you for catching my patch and making it better way. I confirms it also
fixes the original issue. LGTM (nevertheless I'm not an owner).

[Jun Mukai, 2015-06-16 16:31:07]

dewittj, please also take a look.

[dewittj, 2015-06-22 17:10:53]

lgtm

[Jun Mukai, 2015-06-22 17:17:53]

The CQ bit was checked by mukai@chromium.org

[commit-bot: I haz the power, 2015-06-22 17:18:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1187003002/1

[commit-bot: I haz the power, 2015-06-22 18:20:01]

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

[commit-bot: I haz the power, 2015-06-22 18:20:02]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[dewittj, 2015-08-31 16:01:47]

ping

[Jun Mukai, 2015-08-31 16:42:13]

The CQ bit was checked by mukai@chromium.org

[commit-bot: I haz the power, 2015-08-31 16:42:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1187003002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1187003002/1

[commit-bot: I haz the power, 2015-08-31 17:50:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-31 17:51:07]

Patchset 1 (id:??) landed as
https://crrev.com/e0096ef8707579fd6507e3e228df0c0c3afc8df8
Cr-Commit-Position: refs/heads/master@{#346413}