Reland of [heap] Unify evacuating an object for new and old generation.

Reland of [heap] Unify evacuating an object for new and old generation. (patchset #1 id:1 of https://codereview.chromium.org/1483963004/ )

Reason for revert:
Reland after fixing the potential root cause of the canary crasher.

Original issue's description:
> Revert of [heap] Unify evacuating an object for new and old generation. (patchset #2 id:20001 of https://codereview.chromium.org/1481873002/ )
>
> Reason for revert:
> Still investigating bad canary.
>
> Original issue's description:
> > [heap] Unify evacuating an object for new and old generation.
> >
> > BUG=chromium:524425
> > LOG=N
> >
> > Committed: https://crrev.com/afb8bcce8ba889280ed747eb218d287ddd233b4a
> > Cr-Commit-Position: refs/heads/master@{#32365}
>
> TBR=mlippautz@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:524425
>
> Committed: https://crrev.com/9c60ddc60e96da0c59e646660789c26550ad52a2
> Cr-Commit-Position: refs/heads/master@{#32460}

TBR=mlippautz@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:524425
Committed: https://crrev.com/7ea8ac98f6eb5ffa9d4976aa22fec9befb814e0c
Cr-Commit-Position: refs/heads/master@{#32501}

[Hannes Payer (out of office), 2015-12-02 11:03:59]

Created Reland of [heap] Unify evacuating an object for new and old generation.

[commit-bot: I haz the power, 2015-12-02 11:04:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1494533002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1494533002/1

[commit-bot: I haz the power, 2015-12-02 11:04:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-02 11:04:27]

Description was changed from

==========
Reland of [heap] Unify evacuating an object for new and old generation.
(patchset #1 id:1 of https://codereview.chromium.org/1483963004/ )

Reason for revert:
Reland after fixing the potential root cause of the canary crasher.

Original issue's description:
> Revert of [heap] Unify evacuating an object for new and old generation.
(patchset #2 id:20001 of https://codereview.chromium.org/1481873002/ )
> 
> Reason for revert:
> Still investigating bad canary.
> 
> Original issue's description:
> > [heap] Unify evacuating an object for new and old generation.
> >
> > BUG=chromium:524425
> > LOG=N
> >
> > Committed: https://crrev.com/afb8bcce8ba889280ed747eb218d287ddd233b4a
> > Cr-Commit-Position: refs/heads/master@{#32365}
> 
> TBR=mlippautz@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:524425
> 
> Committed: https://crrev.com/9c60ddc60e96da0c59e646660789c26550ad52a2
> Cr-Commit-Position: refs/heads/master@{#32460}

TBR=mlippautz@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:524425
==========

to

==========
Reland of [heap] Unify evacuating an object for new and old generation.
(patchset #1 id:1 of https://codereview.chromium.org/1483963004/ )

Reason for revert:
Reland after fixing the potential root cause of the canary crasher.

Original issue's description:
> Revert of [heap] Unify evacuating an object for new and old generation.
(patchset #2 id:20001 of https://codereview.chromium.org/1481873002/ )
>
> Reason for revert:
> Still investigating bad canary.
>
> Original issue's description:
> > [heap] Unify evacuating an object for new and old generation.
> >
> > BUG=chromium:524425
> > LOG=N
> >
> > Committed: https://crrev.com/afb8bcce8ba889280ed747eb218d287ddd233b4a
> > Cr-Commit-Position: refs/heads/master@{#32365}
>
> TBR=mlippautz@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:524425
>
> Committed: https://crrev.com/9c60ddc60e96da0c59e646660789c26550ad52a2
> Cr-Commit-Position: refs/heads/master@{#32460}

TBR=mlippautz@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:524425

Committed: https://crrev.com/7ea8ac98f6eb5ffa9d4976aa22fec9befb814e0c
Cr-Commit-Position: refs/heads/master@{#32501}
==========

[commit-bot: I haz the power, 2015-12-02 11:04:28]

Patchset 1 (id:??) landed as
https://crrev.com/7ea8ac98f6eb5ffa9d4976aa22fec9befb814e0c
Cr-Commit-Position: refs/heads/master@{#32501}

[Michael Lippautz, 2015-12-02 14:48:40]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1491013003/ by mlippautz@chromium.org.

The reason for reverting is: Speculative revert for crashing Canary..