Simplify the usage of PositionWithAffinity

Simplify the usage of PositionWithAffinity

This patch introduces |anchorNode()|, |document()|, |isOrphan()| and
|isConnected()| to |PositionWithAffinityTemplate| to simplify its usage.
A number of |p.position().foo()| are simplified as |p.foo()|.

BUG=n/a

Committed: https://crrev.com/3e09fda31d18ff70813be2060b2213b44b83a351
Cr-Commit-Position: refs/heads/master@{#424712}

[Xiaocheng, 2016-10-12 07:04:44]

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

[commit-bot: I haz the power, 2016-10-12 07:05:10]

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

[Xiaocheng, 2016-10-12 07:50:29]

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

[Xiaocheng, 2016-10-12 07:50:29]

PTAL.

[yosin_UTC9, 2016-10-12 07:54:52]

The CQ bit was unchecked by yosin@chromium.org

[yosin_UTC9, 2016-10-12 07:54:54]

The CQ bit was checked by yosin@chromium.org

[yosin_UTC9, 2016-10-12 07:54:54]

lgtm

[commit-bot: I haz the power, 2016-10-12 07:55:07]

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

[yosin_UTC9, 2016-10-12 07:56:04]

The CQ bit was unchecked by yosin@chromium.org

[yosin_UTC9, 2016-10-12 07:56:10]

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

[commit-bot: I haz the power, 2016-10-12 07:56:34]

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

[tkent, 2016-10-12 08:00:24]

lgtm

[Xiaocheng, 2016-10-12 08:01:24]

The CQ bit was unchecked by xiaochengh@chromium.org

[Xiaocheng, 2016-10-12 08:01:26]

The CQ bit was checked by xiaochengh@chromium.org

[commit-bot: I haz the power, 2016-10-12 08:01:55]

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, 2016-10-12 11:22:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-12 11:25:05]

Description was changed from

==========
Simplify the usage of PositionWithAffinity

This patch introduces |anchorNode()|, |document()|, |isOrphan()| and
|isConnected()| to |PositionWithAffinityTemplate| to simplify its usage.
A number of |p.position().foo()| are simplified as |p.foo()|.

BUG=n/a
==========

to

==========
Simplify the usage of PositionWithAffinity

This patch introduces |anchorNode()|, |document()|, |isOrphan()| and
|isConnected()| to |PositionWithAffinityTemplate| to simplify its usage.
A number of |p.position().foo()| are simplified as |p.foo()|.

BUG=n/a

Committed: https://crrev.com/3e09fda31d18ff70813be2060b2213b44b83a351
Cr-Commit-Position: refs/heads/master@{#424712}
==========

[commit-bot: I haz the power, 2016-10-12 11:25:06]

Patchset 1 (id:??) landed as
https://crrev.com/3e09fda31d18ff70813be2060b2213b44b83a351
Cr-Commit-Position: refs/heads/master@{#424712}