Reland of [typedarrays] remove invalid optimization in NAMEConstructor()

Reland of [typedarrays] remove invalid optimization in NAMEConstructor() (patchset #1 id:1 of https://codereview.chromium.org/2548583003/ )

Reason for revert:
The bot was not affected by the revert. Speculation was wrong.

Original issue's description:
> Revert of [typedarrays] remove invalid optimization in NAMEConstructor() (patchset #1 id:1 of https://codereview.chromium.org/2544503002/ )
>
> Reason for revert:
> Speculative revert for causing timeouts on Win Debug gpu fyi bot
>
> Nothing else looks even remotely relevant in the list of changes.
> Will reland if this doesn't fix the issues.
>
> BUG=670396
>
> Original issue's description:
> > [typedarrays] remove invalid optimization in NAMEConstructor()
> >
> > Before, we were treating objects with the builtin ArrayValues iterator
> > method as array-like, where the iterator would iterate through to the
> > full length of the object.
> >
> > This optimization was not sound, because it does not ensure that the
> > next method hasn't been modified. Even if it hasn't been modified,
> > it's entirely possible to be modified during iteration. Thus, this
> > optimization has been removed due to its observability.
> >
> > BUG=v8:5699
> > R=littledan@chromium.org, cbruni@chromium.org
> >
> > Committed: https://crrev.com/77df8c67d9609ada3b7d79e8e6d33f198bbad5a1
> > Cr-Commit-Position: refs/heads/master@{#41394}
>
> TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=v8:5699
>
> Committed: https://crrev.com/0ea4a542202d501c4e550474e89512532571f3a0
> Cr-Commit-Position: refs/heads/master@{#41461}

TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com,enne@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=670396
Committed: https://crrev.com/f5cb17a825f9bb995307706eb2aedffeda601b4c
Cr-Commit-Position: refs/heads/master@{#41504}

[ynovikov, 2016-12-05 20:58:41]

The CQ bit was checked by ynovikov@chromium.org

[ynovikov, 2016-12-05 20:58:41]

Created Reland of [typedarrays] remove invalid optimization in NAMEConstructor()

[commit-bot: I haz the power, 2016-12-05 20:58:44]

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, 2016-12-05 20:58:44]

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

[commit-bot: I haz the power, 2016-12-05 20:58:45]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
Committers are members of the group "project-v8-committers".
Note that this has nothing to do with OWNERS files.

[Dan Ehrenberg, 2016-12-05 21:15:59]

The CQ bit was checked by littledan@chromium.org

[Dan Ehrenberg, 2016-12-05 21:16:00]

lgtm

[commit-bot: I haz the power, 2016-12-05 21:16:05]

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, 2016-12-05 21:47:31]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480972559882420, "parent_rev":
"cefd57be5e705a7e4a1f4e2259dd2f6690759078", "commit_rev":
"ffd58bf713f30d24a4e70bb98feafa9c797598ff"}

[commit-bot: I haz the power, 2016-12-05 21:47:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-05 21:48:05]

Description was changed from

==========
Reland of [typedarrays] remove invalid optimization in NAMEConstructor()
(patchset #1 id:1 of https://codereview.chromium.org/2548583003/ )

Reason for revert:
The bot was not affected by the revert. Speculation was wrong.

Original issue's description:
> Revert of [typedarrays] remove invalid optimization in NAMEConstructor()
(patchset #1 id:1 of https://codereview.chromium.org/2544503002/ )
> 
> Reason for revert:
> Speculative revert for causing timeouts on Win Debug gpu fyi bot
> 
> Nothing else looks even remotely relevant in the list of changes.
> Will reland if this doesn't fix the issues.
> 
> BUG=670396
> 
> Original issue's description:
> > [typedarrays] remove invalid optimization in NAMEConstructor()
> >
> > Before, we were treating objects with the builtin ArrayValues iterator
> > method as array-like, where the iterator would iterate through to the
> > full length of the object.
> >
> > This optimization was not sound, because it does not ensure that the
> > next method hasn't been modified. Even if it hasn't been modified,
> > it's entirely possible to be modified during iteration. Thus, this
> > optimization has been removed due to its observability.
> >
> > BUG=v8:5699
> > R=littledan@chromium.org, cbruni@chromium.org
> >
> > Committed: https://crrev.com/77df8c67d9609ada3b7d79e8e6d33f198bbad5a1
> > Cr-Commit-Position: refs/heads/master@{#41394}
> 
> TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=v8:5699
> 
> Committed: https://crrev.com/0ea4a542202d501c4e550474e89512532571f3a0
> Cr-Commit-Position: refs/heads/master@{#41461}

TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com,enne@chromium...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=670396
==========

to

==========
Reland of [typedarrays] remove invalid optimization in NAMEConstructor()
(patchset #1 id:1 of https://codereview.chromium.org/2548583003/ )

Reason for revert:
The bot was not affected by the revert. Speculation was wrong.

Original issue's description:
> Revert of [typedarrays] remove invalid optimization in NAMEConstructor()
(patchset #1 id:1 of https://codereview.chromium.org/2544503002/ )
>
> Reason for revert:
> Speculative revert for causing timeouts on Win Debug gpu fyi bot
>
> Nothing else looks even remotely relevant in the list of changes.
> Will reland if this doesn't fix the issues.
>
> BUG=670396
>
> Original issue's description:
> > [typedarrays] remove invalid optimization in NAMEConstructor()
> >
> > Before, we were treating objects with the builtin ArrayValues iterator
> > method as array-like, where the iterator would iterate through to the
> > full length of the object.
> >
> > This optimization was not sound, because it does not ensure that the
> > next method hasn't been modified. Even if it hasn't been modified,
> > it's entirely possible to be modified during iteration. Thus, this
> > optimization has been removed due to its observability.
> >
> > BUG=v8:5699
> > R=littledan@chromium.org, cbruni@chromium.org
> >
> > Committed: https://crrev.com/77df8c67d9609ada3b7d79e8e6d33f198bbad5a1
> > Cr-Commit-Position: refs/heads/master@{#41394}
>
> TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=v8:5699
>
> Committed: https://crrev.com/0ea4a542202d501c4e550474e89512532571f3a0
> Cr-Commit-Position: refs/heads/master@{#41461}

TBR=cbruni@chromium.org,littledan@chromium.org,caitp@igalia.com,enne@chromium...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=670396

Committed: https://crrev.com/f5cb17a825f9bb995307706eb2aedffeda601b4c
Cr-Commit-Position: refs/heads/master@{#41504}
==========

[commit-bot: I haz the power, 2016-12-05 21:48:06]

Patchset 1 (id:??) landed as
https://crrev.com/f5cb17a825f9bb995307706eb2aedffeda601b4c
Cr-Commit-Position: refs/heads/master@{#41504}