Revert of [heap] Unregister shrinked large object memory from chunk map.

Revert of [heap] Unregister shrinked large object memory from chunk map. (patchset #6 id:100001 of https://codereview.chromium.org/2046953002/ )

Reason for revert:
Revert because uncommit of lo is broken.

Original issue's description:
> [heap] Unregister shrinked large object memory from chunk map.
>
> BUG=chromium:617883
> LOG=n
>
> Committed: https://crrev.com/2b38d3121b5fd0e409cdda0071fa2e0ec2846ab2
> Cr-Commit-Position: refs/heads/master@{#36793}

TBR=ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:617883
Committed: https://crrev.com/56a9e33802c08563495ce0ef5aa47025fe8f594a
Cr-Commit-Position: refs/heads/master@{#36806}

[Hannes Payer (out of office), 2016-06-08 06:11:28]

The CQ bit was checked by hpayer@chromium.org

[Hannes Payer (out of office), 2016-06-08 06:11:29]

Created Revert of [heap] Unregister shrinked large object memory from chunk map.

[commit-bot: I haz the power, 2016-06-08 06:11:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2046563008/1

[commit-bot: I haz the power, 2016-06-08 06:11:46]

Committed patchset #1 (id:1)

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

Description was changed from

==========
Revert of [heap] Unregister shrinked large object memory from chunk map.
(patchset #6 id:100001 of https://codereview.chromium.org/2046953002/ )

Reason for revert:
Revert because uncommit of lo is broken.

Original issue's description:
> [heap] Unregister shrinked large object memory from chunk map.
> 
> BUG=chromium:617883
> LOG=n
> 
> Committed: https://crrev.com/2b38d3121b5fd0e409cdda0071fa2e0ec2846ab2
> Cr-Commit-Position: refs/heads/master@{#36793}

TBR=ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:617883
==========

to

==========
Revert of [heap] Unregister shrinked large object memory from chunk map.
(patchset #6 id:100001 of https://codereview.chromium.org/2046953002/ )

Reason for revert:
Revert because uncommit of lo is broken.

Original issue's description:
> [heap] Unregister shrinked large object memory from chunk map.
>
> BUG=chromium:617883
> LOG=n
>
> Committed: https://crrev.com/2b38d3121b5fd0e409cdda0071fa2e0ec2846ab2
> Cr-Commit-Position: refs/heads/master@{#36793}

TBR=ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:617883

Committed: https://crrev.com/56a9e33802c08563495ce0ef5aa47025fe8f594a
Cr-Commit-Position: refs/heads/master@{#36806}
==========

[commit-bot: I haz the power, 2016-06-08 06:13:07]

Patchset 1 (id:??) landed as
https://crrev.com/56a9e33802c08563495ce0ef5aa47025fe8f594a
Cr-Commit-Position: refs/heads/master@{#36806}