Remove ExtraLanguage entries from InputMethodUtil.

Remove ExtraLanguage entries from InputMethodUtil.

Now InputMethod can be associated with multiple languages, so ExtraLanguage
struct in InputMethodUtil is no longer necessary and update input_methods.txt to
be able to specify multiple languages.

BUG=None
TEST=US-international keyboard layout is still available on Portuguese entry.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=219131

[Seigo Nonaka, 2013-08-20 10:27:56]

Hi Zach, could you take a look?

[Seigo Nonaka, 2013-08-21 22:56:09]

friendly ping

[Zachary Kuznia, 2013-08-21 23:10:24]

lgtm

[Seigo Nonaka, 2013-08-21 23:49:33]

Zach, Thank you for your review!

Adding nkostylev@ as the owner of chrome/browser/ui/webui/options/chromeos/*.

Hi Nikita, could you take an owner look?

Thank you.

[Nikita (slow), 2013-08-22 14:36:38]

lgtm

[commit-bot: I haz the power, 2013-08-22 16:09:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nona@chromium.org/23297004/5001

[commit-bot: I haz the power, 2013-08-22 22:24:43]

Change committed as 219131