Revert of [heap] Optimize ArrayBuffer tracking

Revert of [heap] Optimize ArrayBuffer tracking (patchset #5 id:80001 of https://codereview.chromium.org/2107443002/ )

Reason for revert:
Seems to break GPU bots

Original issue's description:
> [heap] Optimize ArrayBuffer tracking
>
> With the current approach we only need to track using an unordered set as we can
> still access the backing store pointer and length by the time we free the
> backing store.
>
> BUG=chromium:619491, chromium:611688
> LOG=N
> R=ulan@chromium.org
>
> Committed: https://crrev.com/8d2ae27808f047ca8b8f90e63a9c8735321d2ad0
> Cr-Commit-Position: refs/heads/master@{#37318}

TBR=ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:619491, chromium:611688
Committed: https://crrev.com/0e1eaec71d5c6d05169308a71eaa51571e7c4f70
Cr-Commit-Position: refs/heads/master@{#37358}

[Michael Lippautz, 2016-06-29 05:29:07]

The CQ bit was checked by mlippautz@chromium.org

[Michael Lippautz, 2016-06-29 05:29:07]

Created Revert of [heap] Optimize ArrayBuffer tracking

[commit-bot: I haz the power, 2016-06-29 05:29:18]

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, 2016-06-29 05:29:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-29 05:32:07]

Description was changed from

==========
Revert of [heap] Optimize ArrayBuffer tracking (patchset #5 id:80001 of
https://codereview.chromium.org/2107443002/ )

Reason for revert:
Seems to break GPU bots

Original issue's description:
> [heap] Optimize ArrayBuffer tracking
> 
> With the current approach we only need to track using an unordered set as we
can
> still access the backing store pointer and length by the time we free the
> backing store.
> 
> BUG=chromium:619491, chromium:611688
> LOG=N
> R=ulan@chromium.org
> 
> Committed: https://crrev.com/8d2ae27808f047ca8b8f90e63a9c8735321d2ad0
> Cr-Commit-Position: refs/heads/master@{#37318}

TBR=ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:619491, chromium:611688
==========

to

==========
Revert of [heap] Optimize ArrayBuffer tracking (patchset #5 id:80001 of
https://codereview.chromium.org/2107443002/ )

Reason for revert:
Seems to break GPU bots

Original issue's description:
> [heap] Optimize ArrayBuffer tracking
>
> With the current approach we only need to track using an unordered set as we
can
> still access the backing store pointer and length by the time we free the
> backing store.
>
> BUG=chromium:619491, chromium:611688
> LOG=N
> R=ulan@chromium.org
>
> Committed: https://crrev.com/8d2ae27808f047ca8b8f90e63a9c8735321d2ad0
> Cr-Commit-Position: refs/heads/master@{#37318}

TBR=ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:619491, chromium:611688

Committed: https://crrev.com/0e1eaec71d5c6d05169308a71eaa51571e7c4f70
Cr-Commit-Position: refs/heads/master@{#37358}
==========

[commit-bot: I haz the power, 2016-06-29 05:32:08]

Patchset 1 (id:??) landed as
https://crrev.com/0e1eaec71d5c6d05169308a71eaa51571e7c4f70
Cr-Commit-Position: refs/heads/master@{#37358}