Refactor Most{Back,For}wardCaretPosition()

This patch changes |Most{Back,For}wardCaretPosition()| to use
const-variable and early-return style for improving code health.

BUG=707656
TEST=n/a; no behavior changes

Review-Url: https://codereview.chromium.org/2928703002
Cr-Commit-Position: refs/heads/master@{#477841}
Committed: https://chromium.googlesource.com/chromium/src/+/b053be0ada3400b7784fd1a1cba5399e49f2daf9

[yosin_UTC9, 2017-06-07 04:57:17]

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

[commit-bot: I haz the power, 2017-06-07 04:57:50]

Dry run: CQ is trying da patch.

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

[yosin_UTC9, 2017-06-07 04:58:28]

Description was changed from

==========
2017-06-07T13:55:21

BUG=707656

2017-06-07T13:55:09
==========

to

==========
This patch changes |Most{Back,For}wardCaretPosition()| to use
const-variable and early-return style for improving code health.

BUG=707656
TEST=n/a; no behavior changes
==========

[yosin_UTC9, 2017-06-07 06:20:48]

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

[yosin_UTC9, 2017-06-07 06:20:49]

PTAL

[commit-bot: I haz the power, 2017-06-07 06:41:04]

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

[commit-bot: I haz the power, 2017-06-07 06:41:04]

Dry run: This issue passed the CQ dry run.

[Xiaocheng, 2017-06-07 17:36:52]

lgtm

[yosin_UTC9, 2017-06-08 00:54:47]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2017-06-08 00:55:10]

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, 2017-06-08 00:59:34]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496883287209460, "parent_rev":
"269a344191b53f18ec5bfffbdd1ca6be2b3abc61", "commit_rev":
"b053be0ada3400b7784fd1a1cba5399e49f2daf9"}

[commit-bot: I haz the power, 2017-06-08 00:59:46]

Description was changed from

==========
This patch changes |Most{Back,For}wardCaretPosition()| to use
const-variable and early-return style for improving code health.

BUG=707656
TEST=n/a; no behavior changes
==========

to

==========
This patch changes |Most{Back,For}wardCaretPosition()| to use
const-variable and early-return style for improving code health.

BUG=707656
TEST=n/a; no behavior changes

Review-Url: https://codereview.chromium.org/2928703002
Cr-Commit-Position: refs/heads/master@{#477841}
Committed:
https://chromium.googlesource.com/chromium/src/+/b053be0ada3400b7784fd1a1cba5...
==========

[commit-bot: I haz the power, 2017-06-08 00:59:47]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b053be0ada3400b7784fd1a1cba5...