Logically revert r206996, which is no longer used in the era of Aura

Logically revert r206996, which is no longer used in the era of Aura

ui::GetSharedInputMethod() is originally introduced as
a tentative solution until Aura transition is completed on Windows.
Now we can safely revert that change.

BUG=330735, 319122
TEST=covered by unit test because this is dead code removal

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=250020

[yukawa, 2014-02-09 16:23:04]

Hi,
This is another dead code removal. Could you take a look?

[Yuki, 2014-02-09 16:32:37]

lgtm

[commit-bot: I haz the power, 2014-02-09 16:32:48]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/yukawa@chromium.org/158483003/1

[commit-bot: I haz the power, 2014-02-09 16:56:43]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-02-09 16:56:44]

Retried try job too often on linux_rel for step(s) base_unittests,
browser_tests, interactive_ui_tests, net_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...

[yukawa, 2014-02-09 17:21:23]

The CQ bit was checked by yukawa@chromium.org

[commit-bot: I haz the power, 2014-02-09 17:21:33]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/yukawa@chromium.org/158483003/260001

[commit-bot: I haz the power, 2014-02-09 22:58:48]

Change committed as 250020