Clean Up: Remove ibus namespace.

Remove ibus namespace.

ibus namespace is temporary introduced for avoiding name collision with libibus.
So it's time to remove ibus namespace because libibus is already gone.

BUG=None
TEST=try bots.


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=179889

[Seigo Nonaka, 2013-01-10 07:54:20]

ping, just in case.

[satorux1, 2013-01-10 08:21:06]

LGTM, but you should probably wait for a while, as patches like this will make
merging to M25 branch difficult...

[Seigo Nonaka, 2013-01-11 04:52:52]

On 2013/01/10 08:21:06, satorux1 wrote:
> LGTM, but you should probably wait for a while, as patches like this will make
> merging to M25 branch difficult...

Sure, I keep this patch for few weeks.

[satorux1, 2013-01-29 05:19:26]

it's probably ok to land this.

[Seigo Nonaka, 2013-01-31 03:28:16]

Sure, will rebase and submit after submit all current pending changes.

Thanks

[commit-bot: I haz the power, 2013-01-31 13:44:40]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nona@chromium.org/11783053/20001

[commit-bot: I haz the power, 2013-01-31 15:50:30]

Change committed as 179889