Remove unused function UndoStep::belongsTo()

Remove unused function UndoStep::belongsTo()

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

Review-Url: https://codereview.chromium.org/2636083003
Cr-Commit-Position: refs/heads/master@{#444299}
Committed: https://chromium.googlesource.com/chromium/src/+/f83e77a41408ca360fbae05bf3c5572caff88b8f

[Xiaocheng, 2017-01-17 02:53:23]

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

[commit-bot: I haz the power, 2017-01-17 02:53:30]

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

[Xiaocheng, 2017-01-17 03:52:28]

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

[Xiaocheng, 2017-01-17 03:52:29]

PTAL.

[commit-bot: I haz the power, 2017-01-17 04:23:04]

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

[commit-bot: I haz the power, 2017-01-17 04:23:05]

Dry run: This issue passed the CQ dry run.

[yosin_UTC9, 2017-01-18 05:31:36]

The CQ bit was checked by yosin@chromium.org

[yosin_UTC9, 2017-01-18 05:31:36]

lgtm

[commit-bot: I haz the power, 2017-01-18 05:32:16]

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 07:23:32]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484717496424430, "parent_rev":
"eed2e48aa3cc4753f010daf3c04aa363a08aaa66", "commit_rev":
"f83e77a41408ca360fbae05bf3c5572caff88b8f"}

[commit-bot: I haz the power, 2017-01-18 07:24:23]

Description was changed from

==========
Remove unused function UndoStep::belongsTo()

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

to

==========
Remove unused function UndoStep::belongsTo()

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

Review-Url: https://codereview.chromium.org/2636083003
Cr-Commit-Position: refs/heads/master@{#444299}
Committed:
https://chromium.googlesource.com/chromium/src/+/f83e77a41408ca360fbae05bf3c5...
==========

[commit-bot: I haz the power, 2017-01-18 07:24:24]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f83e77a41408ca360fbae05bf3c5...