[iOS/GN] Fix ios_chrome_unittests to pass when build with gn.

[iOS/GN] Fix ios_chrome_unittests to pass when build with gn.

Change compile_xib template to work with different types of xib
files (some do generate xxx.nib/... while other just generate a
single xxx.nib).

Add resources required by ios_chrome_unittests to the application
bundle including compiled native_content_controller_test.xib.

BUG=546283, 459705
Committed: https://crrev.com/2cb71a8ba37fd387113fb2b9f2407f750be158dc
Cr-Commit-Position: refs/heads/master@{#387264}

[sdefresne, 2016-04-13 17:20:10]

sdefresne@chromium.org changed reviewers:
+ dpranke@chromium.org

[sdefresne, 2016-04-13 17:20:11]

Please take a look.

[Dirk Pranke, 2016-04-14 00:45:21]

lgtm

[sdefresne, 2016-04-14 08:24:11]

The CQ bit was checked by sdefresne@chromium.org

[commit-bot: I haz the power, 2016-04-14 08:24:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1880393004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1880393004/1

[commit-bot: I haz the power, 2016-04-14 08:45:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-14 08:46:53]

Description was changed from

==========
[iOS/GN] Fix ios_chrome_unittests to pass when build with gn.

Change compile_xib template to work with different types of xib
files (some do generate xxx.nib/... while other just generate a
single xxx.nib).

Add resources required by ios_chrome_unittests to the application
bundle including compiled native_content_controller_test.xib.

BUG=546283,459705
==========

to

==========
[iOS/GN] Fix ios_chrome_unittests to pass when build with gn.

Change compile_xib template to work with different types of xib
files (some do generate xxx.nib/... while other just generate a
single xxx.nib).

Add resources required by ios_chrome_unittests to the application
bundle including compiled native_content_controller_test.xib.

BUG=546283,459705

Committed: https://crrev.com/2cb71a8ba37fd387113fb2b9f2407f750be158dc
Cr-Commit-Position: refs/heads/master@{#387264}
==========

[commit-bot: I haz the power, 2016-04-14 08:46:54]

Patchset 1 (id:??) landed as
https://crrev.com/2cb71a8ba37fd387113fb2b9f2407f750be158dc
Cr-Commit-Position: refs/heads/master@{#387264}