Update iOS grit whitelist and ifdef out some unused resources.

Update iOS grit whitelist and remove dep on unused resources.

The iOS whitelist was incomplete but things were still working due to
a bug in grit where some resources are being added even if they are not
in the whitelist. The fix for that grit bug is in
https://chromiumcodereview.appspot.com/669763002/

Also, the dependency on ui/native_theme is removed from iOS
because it is unused, allowing the resources to be omitted from the
.pak file.

BUG=None

Committed: https://crrev.com/302dbd2dcc4f2f2f4690b3da284d6405ed7955c8
Cr-Commit-Position: refs/heads/master@{#302106}

[lliabraa, 2014-10-21 18:53:13]

lliabraa@chromium.org changed reviewers:
+ rohitrao@chromium.org

[rohitrao (ping after 24h), 2014-10-21 20:40:28]

Whitelist and gypi changes LGTM

I would prefer to remove the chrome/browser/profiles changes from this CL, since
that's not code that will exist in the long term.

[lliabraa, 2014-10-23 18:05:10]

Okay...avatar changes removed.

[rohitrao (ping after 24h), 2014-10-23 18:08:49]

lgtm

[lliabraa, 2014-10-30 17:19:35]

The CQ bit was checked by lliabraa@chromium.org

[commit-bot: I haz the power, 2014-10-30 17:20:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/667223003/20001

[commit-bot: I haz the power, 2014-10-30 18:03:28]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-30 18:04:05]

Patchset 2 (id:??) landed as
https://crrev.com/302dbd2dcc4f2f2f4690b3da284d6405ed7955c8
Cr-Commit-Position: refs/heads/master@{#302106}