Move class EditCommandComposition to UndoStep.h/cpp

Move class EditCommandComposition to UndoStep.h/cpp

This patch moves class |EditCommandComposition| to UndoStep.h/cpp as a
preparation for getting rid of the |UndoStep| interface and using
|EditCommandComposition| directly.

BUG=682129
TEST=n/a; no behavior change

Review-Url: https://codereview.chromium.org/2639913002
Cr-Commit-Position: refs/heads/master@{#444304}
Committed: https://chromium.googlesource.com/chromium/src/+/e8238843edf7f903b0ab03ae98a3280138421111

[Xiaocheng, 2017-01-18 07:09:28]

The CQ bit was checked by xiaochengh@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-18 07:09:42]

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

[Xiaocheng, 2017-01-18 07:46:04]

xiaochengh@chromium.org changed reviewers:
+ yosin@chromium.org

[Xiaocheng, 2017-01-18 07:46:04]

PTAL.

[Xiaocheng, 2017-01-18 07:48:26]

+chongz: We are removing the purely virtual interface UndoStep, and letting
EditCommandComposition to play its role.

Please rebase your patches in case of conflict.

[yosin_UTC9, 2017-01-18 08:04:32]

The CQ bit was unchecked by yosin@chromium.org

[yosin_UTC9, 2017-01-18 08:05:34]

lgtm

Thanks! It makes us less confusing. (^_^)b
For me, it is hard to distinguish CompositeEditCommand and
EditCommandComposition.

[yosin_UTC9, 2017-01-18 08:05:36]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2017-01-18 08:05:50]

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

[commit-bot: I haz the power, 2017-01-18 08:35:35]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484726736499220, "parent_rev":
"cf55a356c36b96ce9ee4bd6aa33235c87412a3aa", "commit_rev":
"e8238843edf7f903b0ab03ae98a3280138421111"}

[commit-bot: I haz the power, 2017-01-18 08:36:01]

Description was changed from

==========
Move class EditCommandComposition to UndoStep.h/cpp

This patch moves class |EditCommandComposition| to UndoStep.h/cpp as a
preparation for getting rid of the |UndoStep| interface and using
|EditCommandComposition| directly.

BUG=682129
TEST=n/a; no behavior change
==========

to

==========
Move class EditCommandComposition to UndoStep.h/cpp

This patch moves class |EditCommandComposition| to UndoStep.h/cpp as a
preparation for getting rid of the |UndoStep| interface and using
|EditCommandComposition| directly.

BUG=682129
TEST=n/a; no behavior change

Review-Url: https://codereview.chromium.org/2639913002
Cr-Commit-Position: refs/heads/master@{#444304}
Committed:
https://chromium.googlesource.com/chromium/src/+/e8238843edf7f903b0ab03ae98a3...
==========

[commit-bot: I haz the power, 2017-01-18 08:36:02]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e8238843edf7f903b0ab03ae98a3...