Make trace() over persistents private.

Make trace() over persistents private.

Persistent references register a trace callback with the underlying persistent
node, allowing the Blink GC to trace the persistent root set when marking.

Consequently, there's no need to expose their trace() methods as public
methods. Make them private and thereby disallow calling trace() from
Blink code.

R=
BUG=

Committed: https://crrev.com/047902223d816789a303b50ae21332668d85d6ed
Cr-Commit-Position: refs/heads/master@{#399423}

[sof, 2016-06-12 07:03:03]

sigbjornf@opera.com changed reviewers:
+ oilpan-reviews@chromium.org

[sof, 2016-06-12 07:03:03]

please take a look.

[haraken, 2016-06-12 07:05:34]

LGTM

[sof, 2016-06-12 14:31:35]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2016-06-12 14:31:44]

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

[commit-bot: I haz the power, 2016-06-12 14:31:44]

This CL has an open dependency (Issue 2063603002 Patch 1). Please resolve the
dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[sof, 2016-06-13 08:49:05]

The CQ bit was checked by sigbjornf@opera.com

[sof, 2016-06-13 08:49:06]

The patchset sent to the CQ was uploaded after l-g-t-m from haraken@chromium.org
Link to the patchset: https://codereview.chromium.org/2060683002/#ps40001
(title: "rebased")

[commit-bot: I haz the power, 2016-06-13 08:49:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2060683002/40001

[commit-bot: I haz the power, 2016-06-13 10:31:09]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-06-13 10:32:20]

Description was changed from

==========
Make trace() over persistents private.

Persistent references register a trace callback with the underlying persistent
node, allowing the Blink GC to trace the persistent root set when marking.

Consequently, there's no need to expose their trace() methods as public
methods. Make them private and thereby disallow calling trace() from
Blink code.

R=
BUG=
==========

to

==========
Make trace() over persistents private.

Persistent references register a trace callback with the underlying persistent
node, allowing the Blink GC to trace the persistent root set when marking.

Consequently, there's no need to expose their trace() methods as public
methods. Make them private and thereby disallow calling trace() from
Blink code.

R=
BUG=

Committed: https://crrev.com/047902223d816789a303b50ae21332668d85d6ed
Cr-Commit-Position: refs/heads/master@{#399423}
==========

[commit-bot: I haz the power, 2016-06-13 10:32:21]

Patchset 3 (id:??) landed as
https://crrev.com/047902223d816789a303b50ae21332668d85d6ed
Cr-Commit-Position: refs/heads/master@{#399423}