Revert of Fix setComposingText with empty text when newCursorPosition != 1

Revert of Fix setComposingText with empty text when newCursorPosition != 1 (patchset #16 id:300001 of https://codereview.chromium.org/2020973002/ )

Reason for revert:
This caused a regression (https://crbug.com/633840), and there doesn't seem to be an easy fix.

Original issue's description:
> Fix setComposingText with empty text when newCursorPosition != 1
>
> setComposingText("", newCursorPosition) doesn't work fine when
> newCursorPosition != 1. It should behave the same as
> commitText("", newCursorPosition), because when the text is empty,
> commitText will call InputMethodController::setComposition, which is
> exactly the same as setComposingText().
>
> BUG=570920
>
> Committed: https://crrev.com/f22aa57c3e53c94264b0a0ac6e556ac03b89f372
> Cr-Commit-Position: refs/heads/master@{#409169}

TBR=yosin@chromium.org,aelias@chromium.org,esprehn@chromium.org,tkent@chromium.org,yabinh@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=570920
Committed: https://crrev.com/eb158294ffe22a859edd49038e5248dbb7895ca8
Cr-Commit-Position: refs/heads/master@{#410946}

[Changwan Ryu, 2016-08-10 00:54:58]

The CQ bit was checked by changwan@chromium.org

[Changwan Ryu, 2016-08-10 00:54:58]

Created Revert of Fix setComposingText with empty text when newCursorPosition !=
1

[commit-bot: I haz the power, 2016-08-10 00:55:32]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[tkent, 2016-08-10 01:02:31]

lgtm

[commit-bot: I haz the power, 2016-08-10 03:36:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-10 03:38:49]

Description was changed from

==========
Revert of Fix setComposingText with empty text when newCursorPosition != 1
(patchset #16 id:300001 of https://codereview.chromium.org/2020973002/ )

Reason for revert:
This caused a regression (https://crbug.com/633840), and there doesn't seem to
be an easy fix.

Original issue's description:
> Fix setComposingText with empty text when newCursorPosition != 1
> 
> setComposingText("", newCursorPosition) doesn't work fine when
> newCursorPosition != 1. It should behave the same as
> commitText("", newCursorPosition), because when the text is empty,
> commitText will call InputMethodController::setComposition, which is
> exactly the same as setComposingText().
> 
> BUG=570920
> 
> Committed: https://crrev.com/f22aa57c3e53c94264b0a0ac6e556ac03b89f372
> Cr-Commit-Position: refs/heads/master@{#409169}

TBR=yosin@chromium.org,aelias@chromium.org,esprehn@chromium.org,tkent@chromiu...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=570920
==========

to

==========
Revert of Fix setComposingText with empty text when newCursorPosition != 1
(patchset #16 id:300001 of https://codereview.chromium.org/2020973002/ )

Reason for revert:
This caused a regression (https://crbug.com/633840), and there doesn't seem to
be an easy fix.

Original issue's description:
> Fix setComposingText with empty text when newCursorPosition != 1
>
> setComposingText("", newCursorPosition) doesn't work fine when
> newCursorPosition != 1. It should behave the same as
> commitText("", newCursorPosition), because when the text is empty,
> commitText will call InputMethodController::setComposition, which is
> exactly the same as setComposingText().
>
> BUG=570920
>
> Committed: https://crrev.com/f22aa57c3e53c94264b0a0ac6e556ac03b89f372
> Cr-Commit-Position: refs/heads/master@{#409169}

TBR=yosin@chromium.org,aelias@chromium.org,esprehn@chromium.org,tkent@chromiu...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=570920

Committed: https://crrev.com/eb158294ffe22a859edd49038e5248dbb7895ca8
Cr-Commit-Position: refs/heads/master@{#410946}
==========

[commit-bot: I haz the power, 2016-08-10 03:38:50]

Patchset 1 (id:??) landed as
https://crrev.com/eb158294ffe22a859edd49038e5248dbb7895ca8
Cr-Commit-Position: refs/heads/master@{#410946}