Remove use_ibus variable from gyp file.

Remove use_ibus variable from gyp file.

We can remove use_ibus flag because the ibus dependency was gone.

BUG=None
TEST=try bots


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=178568

[satorux1, 2013-01-22 17:01:11]

LGTM

[Seigo Nonaka, 2013-01-23 08:17:50]

satorux: Thank you for you review.

adding ben@ as the owner of ui/ ash/ chrome/

Could you take a look?

I replaced all libibus stuff to own implementation.
Thus this patch removes use_ibus variable and ibus dependency from chrome.

Thank you.

[Ben Goodger (Google), 2013-01-23 22:15:25]

lgtm

[commit-bot: I haz the power, 2013-01-24 03:46:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nona@chromium.org/11896029/1

[commit-bot: I haz the power, 2013-01-24 04:57:52]

Retried try job too often on win_rel for step(s) chrome_frame_net_tests,
sync_integration_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2013-01-24 11:01:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nona@chromium.org/11896029/1

[commit-bot: I haz the power, 2013-01-24 14:43:39]

Change committed as 178568