Revert "[heap] Make SlotSet allocation thread-safe and refactor code."

Revert "[heap] Make SlotSet allocation thread-safe and refactor code."

This reverts commit 00d3098d70e76ba71afcec9935d6d37f0b49f53a.

BUG=chromium:694255, v8:6138
Review-Url: https://codereview.chromium.org/2773093002
Cr-Commit-Position: refs/heads/master@{#44100}
Committed: https://chromium.googlesource.com/v8/v8/+/4693a4337a5fdff6645786518e560cd476c765d8

[Hannes Payer (out of office), 2017-03-24 12:10:23]

The CQ bit was checked by hpayer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-24 12:10:27]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[ulan, 2017-03-24 12:11:15]

ulan@chromium.org changed reviewers:
+ ulan@chromium.org

[ulan, 2017-03-24 12:11:16]

lgtm

[Hannes Payer (out of office), 2017-03-24 12:17:00]

The CQ bit was unchecked by hpayer@chromium.org

[Hannes Payer (out of office), 2017-03-24 12:17:01]

The CQ bit was checked by hpayer@chromium.org

[commit-bot: I haz the power, 2017-03-24 12:17:08]

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, 2017-03-24 12:36:08]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490357821678120, "parent_rev":
"15898daf7cc473c0296b0d754e483a0d5e296a42", "commit_rev":
"4693a4337a5fdff6645786518e560cd476c765d8"}

[commit-bot: I haz the power, 2017-03-24 12:36:14]

Description was changed from

==========
Revert "[heap] Make SlotSet allocation thread-safe and refactor code."

This reverts commit 00d3098d70e76ba71afcec9935d6d37f0b49f53a.

BUG=chromium:694255,v8:6138
==========

to

==========
Revert "[heap] Make SlotSet allocation thread-safe and refactor code."

This reverts commit 00d3098d70e76ba71afcec9935d6d37f0b49f53a.

BUG=chromium:694255,v8:6138

Review-Url: https://codereview.chromium.org/2773093002
Cr-Commit-Position: refs/heads/master@{#44100}
Committed:
https://chromium.googlesource.com/v8/v8/+/4693a4337a5fdff6645786518e560cd476c...
==========

[commit-bot: I haz the power, 2017-03-24 12:36:15]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/4693a4337a5fdff6645786518e560cd476c...