Kill login after logging in.

Rather than keeping it around forever, we should kill it. Now that the user shell is acting as the login broker for apps run for that user, it's not necessary to keep login too. This simplifies the login app a bit.

BUG=

Committed: https://crrev.com/5953178290205c37dbe478fcba0048d2141dcaf3
Cr-Commit-Position: refs/heads/master@{#381856}

[Ben Goodger (Google), 2016-03-17 22:59:47]

Description was changed from

==========
More login restructuring

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

to

==========
Rather than keeping it around forever, we should kill it. Now that the user
shell is acting as the login broker for apps run for that user, it's not
necessary to keep login too. This simplifies the login app a bit.

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

[Ben Goodger (Google), 2016-03-17 22:59:47]

ben@chromium.org changed reviewers:
+ sky@chromium.org

[sky, 2016-03-17 23:21:38]

LGTM

[Ben Goodger (Google), 2016-03-17 23:28:53]

The CQ bit was checked by ben@chromium.org

[Ben Goodger (Google), 2016-03-17 23:28:53]

The patchset sent to the CQ was uploaded after l-g-t-m from sky@chromium.org
Link to the patchset: https://codereview.chromium.org/1806203002/#ps120001
(title: ".")

[commit-bot: I haz the power, 2016-03-17 23:29:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1806203002/120001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1806203002/120001

[commit-bot: I haz the power, 2016-03-18 00:54:57]

Description was changed from

==========
Rather than keeping it around forever, we should kill it. Now that the user
shell is acting as the login broker for apps run for that user, it's not
necessary to keep login too. This simplifies the login app a bit.

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

to

==========
Rather than keeping it around forever, we should kill it. Now that the user
shell is acting as the login broker for apps run for that user, it's not
necessary to keep login too. This simplifies the login app a bit.

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

[commit-bot: I haz the power, 2016-03-18 00:54:58]

Committed patchset #7 (id:120001)

[commit-bot: I haz the power, 2016-03-18 00:56:21]

Description was changed from

==========
Rather than keeping it around forever, we should kill it. Now that the user
shell is acting as the login broker for apps run for that user, it's not
necessary to keep login too. This simplifies the login app a bit.

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

to

==========
Rather than keeping it around forever, we should kill it. Now that the user
shell is acting as the login broker for apps run for that user, it's not
necessary to keep login too. This simplifies the login app a bit.

BUG=

Committed: https://crrev.com/5953178290205c37dbe478fcba0048d2141dcaf3
Cr-Commit-Position: refs/heads/master@{#381856}
==========

[commit-bot: I haz the power, 2016-03-18 00:56:22]

Patchset 7 (id:??) landed as
https://crrev.com/5953178290205c37dbe478fcba0048d2141dcaf3
Cr-Commit-Position: refs/heads/master@{#381856}