Fix GN ui_unittests dependency for Chrome OS.

Fix GN ui_unittests dependency for Chrome OS.

This CL replaces the mistyped //chromeos/resources and
//chromeos/strings dependency (introduced by r302142) with
//ui/chromeos/resources and //ui/chromeos/strings.

BUG=None
TEST=Run `gn gen --args='os="chromeos" ...`

Committed: https://crrev.com/9f3da8d4d5e068fdb32a8ed3d4c8f30a03de8ee0
Cr-Commit-Position: refs/heads/master@{#302450}

[Ben Chan, 2014-11-03 17:28:23]

benchan@chromium.org changed reviewers:
+ sadrul@chromium.org, sky@chromium.org, stevenjb@chromium.org

[stevenjb, 2014-11-03 17:58:38]

lgtm, thanks!

[sadrul, 2014-11-03 17:59:44]

lgtm

[Ben Chan, 2014-11-03 18:00:22]

The CQ bit was checked by benchan@chromium.org

[commit-bot: I haz the power, 2014-11-03 18:01:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/698033002/1

[commit-bot: I haz the power, 2014-11-03 18:42:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-03 18:42:57]

Patchset 1 (id:??) landed as
https://crrev.com/9f3da8d4d5e068fdb32a8ed3d4c8f30a03de8ee0
Cr-Commit-Position: refs/heads/master@{#302450}