Reland of Do not remove write barriers for stores of old space references in most recent old space allocation.

Reland of Do not remove write barriers for stores of old space references in most recent old space allocation. (patchset #1 id:1 of https://codereview.chromium.org/1482973003/ )

Reason for revert:
Suspect for crashing found, relanding for canary coverage.

Original issue's description:
> Revert of Do not remove write barriers for stores of old space references in most recent old space allocation. (patchset #1 id:1 of https://codereview.chromium.org/1478113002/ )
>
> Reason for revert:
> Broken canary. Trying to find out root cause.
>
> Original issue's description:
> > Do not remove write barriers for stores of old space references in most recent old space allocation.
> >
> > BUG=chromium:561449
> > LOG=n
> >
> > Committed: https://crrev.com/369778ec55a63ebe51e8fa8497edb5b681069b9b
> > Cr-Commit-Position: refs/heads/master@{#32368}
>
> TBR=ulan@chromium.org,bmeurer@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:561449
>
> Committed: https://crrev.com/da56525478f1820e3da629576ab61acc5f84daac
> Cr-Commit-Position: refs/heads/master@{#32406}

TBR=ulan@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561449
Committed: https://crrev.com/fa7a07c3bd9777eddd6ccf67b643e4c89f88947d
Cr-Commit-Position: refs/heads/master@{#32555}

[Hannes Payer (out of office), 2015-12-03 12:23:28]

Created Reland of Do not remove write barriers for stores of old space
references in most recent old space allocation.

[commit-bot: I haz the power, 2015-12-03 12:24:24]

Description was changed from

==========
Reland of Do not remove write barriers for stores of old space references in
most recent old space allocation. (patchset #1 id:1 of
https://codereview.chromium.org/1482973003/ )

Reason for revert:
Suspect for crashing found, relanding for canary coverage.

Original issue's description:
> Revert of Do not remove write barriers for stores of old space references in
most recent old space allocation. (patchset #1 id:1 of
https://codereview.chromium.org/1478113002/ )
> 
> Reason for revert:
> Broken canary. Trying to find out root cause.
> 
> Original issue's description:
> > Do not remove write barriers for stores of old space references in most
recent old space allocation.
> >
> > BUG=chromium:561449
> > LOG=n
> >
> > Committed: https://crrev.com/369778ec55a63ebe51e8fa8497edb5b681069b9b
> > Cr-Commit-Position: refs/heads/master@{#32368}
> 
> TBR=ulan@chromium.org,bmeurer@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:561449
> 
> Committed: https://crrev.com/da56525478f1820e3da629576ab61acc5f84daac
> Cr-Commit-Position: refs/heads/master@{#32406}

TBR=ulan@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561449
==========

to

==========
Reland of Do not remove write barriers for stores of old space references in
most recent old space allocation. (patchset #1 id:1 of
https://codereview.chromium.org/1482973003/ )

Reason for revert:
Suspect for crashing found, relanding for canary coverage.

Original issue's description:
> Revert of Do not remove write barriers for stores of old space references in
most recent old space allocation. (patchset #1 id:1 of
https://codereview.chromium.org/1478113002/ )
>
> Reason for revert:
> Broken canary. Trying to find out root cause.
>
> Original issue's description:
> > Do not remove write barriers for stores of old space references in most
recent old space allocation.
> >
> > BUG=chromium:561449
> > LOG=n
> >
> > Committed: https://crrev.com/369778ec55a63ebe51e8fa8497edb5b681069b9b
> > Cr-Commit-Position: refs/heads/master@{#32368}
>
> TBR=ulan@chromium.org,bmeurer@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:561449
>
> Committed: https://crrev.com/da56525478f1820e3da629576ab61acc5f84daac
> Cr-Commit-Position: refs/heads/master@{#32406}

TBR=ulan@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561449

Committed: https://crrev.com/fa7a07c3bd9777eddd6ccf67b643e4c89f88947d
Cr-Commit-Position: refs/heads/master@{#32555}
==========