Revert of [heap] Concurrent slot filtering in sweeper threads.

Revert of [heap] Concurrent slot filtering in sweeper threads. (patchset #4 id:60001 of https://codereview.chromium.org/2401563002/ )

Reason for revert:
Crashing.

Original issue's description:
> [heap] Concurrent slot filtering in sweeper threads.
>
> This is an intermediate step for concurrent slot filtering. This CL already makes filtering concurrent, but does not integrate it in the actual sweeping. This will be done in two follow up CLs. One for the regular slot set and one for the typed slot set.
>
> BUG=chromium:648568
>
> Committed: https://crrev.com/1f89d369fc952a2826f9f62901fb84fcf30920d7
> Cr-Commit-Position: refs/heads/master@{#40040}

TBR=ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648568
Committed: https://crrev.com/0083c0931a1def528aca12b29133dd26c718fe28
Cr-Commit-Position: refs/heads/master@{#40043}

[Hannes Payer (out of office), 2016-10-06 14:20:26]

The CQ bit was checked by hpayer@chromium.org

[Hannes Payer (out of office), 2016-10-06 14:20:26]

Created Revert of [heap] Concurrent slot filtering in sweeper threads.

[commit-bot: I haz the power, 2016-10-06 14:20:34]

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, 2016-10-06 14:20:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-06 14:21:08]

Description was changed from

==========
Revert of [heap] Concurrent slot filtering in sweeper threads. (patchset #4
id:60001 of https://codereview.chromium.org/2401563002/ )

Reason for revert:
Crashing.

Original issue's description:
> [heap] Concurrent slot filtering in sweeper threads.
> 
> This is an intermediate step for concurrent slot filtering. This CL already
makes filtering concurrent, but does not integrate it in the actual sweeping.
This will be done in two follow up CLs. One for the regular slot set and one for
the typed slot set.
> 
> BUG=chromium:648568
> 
> Committed: https://crrev.com/1f89d369fc952a2826f9f62901fb84fcf30920d7
> Cr-Commit-Position: refs/heads/master@{#40040}

TBR=ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648568
==========

to

==========
Revert of [heap] Concurrent slot filtering in sweeper threads. (patchset #4
id:60001 of https://codereview.chromium.org/2401563002/ )

Reason for revert:
Crashing.

Original issue's description:
> [heap] Concurrent slot filtering in sweeper threads.
>
> This is an intermediate step for concurrent slot filtering. This CL already
makes filtering concurrent, but does not integrate it in the actual sweeping.
This will be done in two follow up CLs. One for the regular slot set and one for
the typed slot set.
>
> BUG=chromium:648568
>
> Committed: https://crrev.com/1f89d369fc952a2826f9f62901fb84fcf30920d7
> Cr-Commit-Position: refs/heads/master@{#40040}

TBR=ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648568

Committed: https://crrev.com/0083c0931a1def528aca12b29133dd26c718fe28
Cr-Commit-Position: refs/heads/master@{#40043}
==========

[commit-bot: I haz the power, 2016-10-06 14:21:09]

Patchset 1 (id:??) landed as
https://crrev.com/0083c0931a1def528aca12b29133dd26c718fe28
Cr-Commit-Position: refs/heads/master@{#40043}