Use correct creation context when converting sequences to V8

Use correct creation context when converting sequences to V8

The |creationContext| argument is often a reference to a window proxy
object, that may become incorrect to use if the frame is navigated and/or
detached during the loop that converts values.

BUG=607483
Committed: https://crrev.com/eb335fd1006cef3299221ebd14a8795679660e32
Cr-Commit-Position: refs/heads/master@{#390408}

[Jens Widell, 2016-04-28 10:47:45]

jl@opera.com changed reviewers:
+ haraken@chromium.org, yukishiino@chromium.org

[Jens Widell, 2016-04-28 10:47:46]

PTAL

Noteworthy: this patch changes what

  frames[0].navigator.languages instanceof Array

evaluates to, from true to false, since we now apply the |creationContext|
argument to the creation of the array as well as to the items in it.

It is false in Firefox 45 (e.g. we now become compatible with FF on this), and
is in my opinion the correct behavior.

[Yuki, 2016-04-28 11:02:19]

Totally agreed.  LGTM.

[Jens Widell, 2016-04-28 15:30:26]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2016-04-28 15:30:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1924073003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1924073003/1

[commit-bot: I haz the power, 2016-04-28 17:05:08]

Committed patchset #1 (id:1)

[haraken, 2016-04-28 19:21:29]

LGTM

[commit-bot: I haz the power, 2016-04-30 17:19:15]

Patchset 1 (id:??) landed as
https://crrev.com/eb335fd1006cef3299221ebd14a8795679660e32
Cr-Commit-Position: refs/heads/master@{#390408}

[commit-bot: I haz the power, 2016-04-30 17:56:17]

Description was changed from

==========
Use correct creation context when converting sequences to V8

The |creationContext| argument is often a reference to a window proxy
object, that may become incorrect to use if the frame is navigated and/or
detached during the loop that converts values.

BUG=607483
==========

to

==========
Use correct creation context when converting sequences to V8

The |creationContext| argument is often a reference to a window proxy
object, that may become incorrect to use if the frame is navigated and/or
detached during the loop that converts values.

BUG=607483

Committed: https://crrev.com/eb335fd1006cef3299221ebd14a8795679660e32
Cr-Commit-Position: refs/heads/master@{#390408}
==========