Strips some unnecessary deps in app_list_controller_delegate.cc

Strips some unnecessary deps in app_list_controller_delegate.cc

- app_list_syncable_service is unnecessary at all
- browser_navigator is not necessary, we've introduced OpenURL

BUG=None
R=xiyuan@chromium.org
TEST=build succeeds

Committed: https://crrev.com/8fab32f6225203a3fd56e0a723e65176126acbb5
Cr-Commit-Position: refs/heads/master@{#299378}

[xiyuan, 2014-10-13 21:07:24]

lgtm

[Jun Mukai, 2014-10-13 21:09:19]

The CQ bit was checked by mukai@chromium.org

[commit-bot: I haz the power, 2014-10-13 21:09:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/650473002/1

[commit-bot: I haz the power, 2014-10-13 22:32:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-13 22:33:04]

Patchset 1 (id:??) landed as
https://crrev.com/8fab32f6225203a3fd56e0a723e65176126acbb5
Cr-Commit-Position: refs/heads/master@{#299378}