app_list_folder_item.h: Fix typedefs and includes (ahead of refactor).

app_list_folder_item.h: Fix typedefs and includes (ahead of refactor).

- Removed the 'Rects' typedef. Should not be exporting this; it will
  cause trouble when refactoring.
- Forward-declare gfx::Rect instead of including it.
- Added missing include in app_list_controller_delegate.cc (exposed by
  removing the include in app_list_folder_item.h).

BUG=425444
Committed: https://crrev.com/160798857aaddc953e37526af7fa5b1859dad32d
Cr-Commit-Position: refs/heads/master@{#300838}

[Matt Giuca, 2014-10-21 06:56:21]

mgiuca@chromium.org changed reviewers:
+ calamity@chromium.org

[Matt Giuca, 2014-10-21 06:56:21]

mgiuca@chromium.org changed required reviewers:
+ calamity@chromium.org

[calamity, 2014-10-23 02:48:29]

lgtm

[Matt Giuca, 2014-10-23 04:13:05]

The CQ bit was checked by mgiuca@chromium.org

[commit-bot: I haz the power, 2014-10-23 04:14:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/645603003/1

[commit-bot: I haz the power, 2014-10-23 05:02:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-23 05:03:59]

Patchset 1 (id:??) landed as
https://crrev.com/160798857aaddc953e37526af7fa5b1859dad32d
Cr-Commit-Position: refs/heads/master@{#300838}