Revert of [heap] Fix Sweeper::IsSweepingCompleted

Revert of [heap] Fix Sweeper::IsSweepingCompleted (patchset #1 id:1 of https://codereview.chromium.org/2047013004/ )

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/10009

Original issue's description:
> [heap] Fix Sweeper::IsSweepingCompleted
>
> R=ulan@chromium.org
>
> Committed: https://crrev.com/b4475fff4fe1c423a3c8c3b072e09becd6b2f8ed
> Cr-Commit-Position: refs/heads/master@{#36845}

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

Committed: https://crrev.com/0bccf3e66415fc6cee9528bf8777e0b30c31c435
Cr-Commit-Position: refs/heads/master@{#36850}

[Michael Lippautz, 2016-06-09 10:27:05]

The CQ bit was checked by mlippautz@chromium.org

[Michael Lippautz, 2016-06-09 10:27:06]

Created Revert of [heap] Fix Sweeper::IsSweepingCompleted

[commit-bot: I haz the power, 2016-06-09 10:27:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2053623002/1

[commit-bot: I haz the power, 2016-06-09 10:27:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-09 10:28:55]

Description was changed from

==========
Revert of [heap] Fix Sweeper::IsSweepingCompleted (patchset #1 id:1 of
https://codereview.chromium.org/2047013004/ )

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/10009

Original issue's description:
> [heap] Fix Sweeper::IsSweepingCompleted
> 
> R=ulan@chromium.org
> 
> Committed: https://crrev.com/b4475fff4fe1c423a3c8c3b072e09becd6b2f8ed
> Cr-Commit-Position: refs/heads/master@{#36845}

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

to

==========
Revert of [heap] Fix Sweeper::IsSweepingCompleted (patchset #1 id:1 of
https://codereview.chromium.org/2047013004/ )

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/10009

Original issue's description:
> [heap] Fix Sweeper::IsSweepingCompleted
>
> R=ulan@chromium.org
>
> Committed: https://crrev.com/b4475fff4fe1c423a3c8c3b072e09becd6b2f8ed
> Cr-Commit-Position: refs/heads/master@{#36845}

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

Committed: https://crrev.com/0bccf3e66415fc6cee9528bf8777e0b30c31c435
Cr-Commit-Position: refs/heads/master@{#36850}
==========

[commit-bot: I haz the power, 2016-06-09 10:28:56]

Patchset 1 (id:??) landed as
https://crrev.com/0bccf3e66415fc6cee9528bf8777e0b30c31c435
Cr-Commit-Position: refs/heads/master@{#36850}