Wait for 'after_install' from widget before closing SuggestAppsDialog

Wait for 'after_install' from widget before closing SuggestAppsDialog

The widget design doc indicates that the widget can be closed
after 'after_install' is received. This message was not previously
handled by suggest apps dialog.

BUG=439446
TEST=Installed file handler/file system provider from SuggestAppsDialog

Committed: https://crrev.com/73accbabee734542f611896b06db4b7b57475a75
Cr-Commit-Position: refs/heads/master@{#325105}

[tbarzic, 2015-04-07 02:12:06]

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

[tbarzic, 2015-04-07 02:12:07]

Built on top of https://codereview.chromium.org/1068653002/
(a little thing I noticed while working on that patch).
Please take a look.

[yoshiki, 2015-04-07 07:32:51]

lgtm. Thanks!

[tbarzic, 2015-04-07 18:53:57]

The CQ bit was checked by tbarzic@chromium.org

[tbarzic, 2015-04-07 18:53:58]

The patchset sent to the CQ was uploaded after l-g-t-m from yoshiki@chromium.org
Link to the patchset: https://codereview.chromium.org/1061133005/#ps60001
(title: ".")

[commit-bot: I haz the power, 2015-04-07 18:54:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1061133005/60001

[commit-bot: I haz the power, 2015-04-07 20:41:17]

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

[commit-bot: I haz the power, 2015-04-07 20:41:18]

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_...)

[tbarzic, 2015-04-08 06:18:24]

fixed the failing test, PTAL

[tbarzic, 2015-04-14 17:14:21]

The CQ bit was checked by tbarzic@chromium.org

[tbarzic, 2015-04-14 17:14:21]

The patchset sent to the CQ was uploaded after l-g-t-m from yoshiki@chromium.org
Link to the patchset: https://codereview.chromium.org/1061133005/#ps100001
(title: "rebase")

[commit-bot: I haz the power, 2015-04-14 17:15:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1061133005/100001

[commit-bot: I haz the power, 2015-04-14 19:40:07]

Committed patchset #6 (id:100001)

[commit-bot: I haz the power, 2015-04-14 19:41:04]

Patchset 6 (id:??) landed as
https://crrev.com/73accbabee734542f611896b06db4b7b57475a75
Cr-Commit-Position: refs/heads/master@{#325105}