Revert of Moves code from chromeos/ime to ui/base/ime/chromeos.

Revert of Moves code from chromeos/ime to ui/base/ime/chromeos. (patchset #18 id:340001 of https://codereview.chromium.org/727143002/)

Reason for revert:
fails to compile on Linux ChromiumOS GN

clang: error: no such file or directory: '../../chromeos/ime/mock_component_extension_ime_manager_delegate.cc'

Original issue's description:
> Moves code from chromeos/ime to ui/base/ime/chromeos.
>
> This is because the code under chromeos/ime has inappropriate dependencies to src/ui.
> This cl doesn't include any logic changes in code, and only contains changes of moving files, changing includes, and necessary changes in GYPs and build rules.
>
> Note:
> 1) the input_methods.txt & gen_input_methods.py remain unchanged because auto-test requires input_methods.txt file to be available, and input_method_whitelist needs the generated input_methods.h for compile. It could be moved in later CLs.
> 2) We've been discussing the naming for ui/chromeos/ime, which could be renamed to something for "views". It can be done in a separated cl.
>
> TBR=sky@chromium.org
> BUG=431863
> TEST=Verified on linux_chromeos.
>
> Committed: https://crrev.com/9917a3671cafa9d31a071a530b9ce10ce0661bc9
> Cr-Commit-Position: refs/heads/master@{#305964}

TBR=yukishiino@chromium.org,stevenjb@chromium.org,sky@chromium.org,mukai@chromium.org,pkasting@chromium.org,derat@chromium.org,shuchen@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=431863
Committed: https://crrev.com/857735b6255938981bf2dec4aee80e7bc6523631
Cr-Commit-Position: refs/heads/master@{#305965}

[jochen (gone - plz use gerrit), 2014-11-27 07:57:34]

Created Revert of Moves code from chromeos/ime to ui/base/ime/chromeos.

[commit-bot: I haz the power, 2014-11-27 07:58:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/750353004/1

[commit-bot: I haz the power, 2014-11-27 08:00:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-27 08:00:43]

Patchset 1 (id:??) landed as
https://crrev.com/857735b6255938981bf2dec4aee80e7bc6523631
Cr-Commit-Position: refs/heads/master@{#305965}