Revert of [heap] Reland "Make non-atomic markbit operations consistent with atomic ones."

Revert of [heap] Reland "Make non-atomic markbit operations consistent with atomic ones." (patchset #2 id:20001 of https://codereview.chromium.org/2860323003/ )

Reason for revert:
box2d failures on buildbot

Original issue's description:
> [heap] Reland "Make non-atomic markbit operations consistent with atomic ones."
> 
> Now non-atomic color transition operations return a boolean indicating
> whether the transition succeeded or not.
> 
> This allows to replace color check and transition operations with a
> single transition operation. For example:
> 
> if (IsWhite(object)) {
>   WhiteToBlack(object);
>   Foo();
> }
> 
> becomes
> 
> if (WhiteToBlack(object)) {
>   Foo();
> }
> 
> BUG=chromium:694255
> 
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng
> 
> Review-Url: https://codereview.chromium.org/2860323003
> Cr-Commit-Position: refs/heads/master@{#45123}
> Committed: https://chromium.googlesource.com/v8/v8/+/c0a65cd295301f334e2bbfcce46a937cd708beec

TBR=mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:694255
Review-Url: https://codereview.chromium.org/2863953002
Cr-Commit-Position: refs/heads/master@{#45127}
Committed: https://chromium.googlesource.com/v8/v8/+/b7b3781b8747d597cf0910c65221ad2b1881e0e4

[ulan, 2017-05-05 11:17:04]

The CQ bit was checked by ulan@chromium.org

[ulan, 2017-05-05 11:17:05]

Created Revert of [heap] Reland "Make non-atomic markbit operations consistent
with atomic ones."

[commit-bot: I haz the power, 2017-05-05 11:17:10]

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, 2017-05-05 11:17:15]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493983024580350, "parent_rev":
"d7f7c324245ca78ef03d7d8a893bee40b07b19bd", "commit_rev":
"b7b3781b8747d597cf0910c65221ad2b1881e0e4"}

[commit-bot: I haz the power, 2017-05-05 11:17:20]

Description was changed from

==========
Revert of [heap] Reland "Make non-atomic markbit operations consistent with
atomic ones." (patchset #2 id:20001 of
https://codereview.chromium.org/2860323003/ )

Reason for revert:
box2d failures on buildbot

Original issue's description:
> [heap] Reland "Make non-atomic markbit operations consistent with atomic
ones."
> 
> Now non-atomic color transition operations return a boolean indicating
> whether the transition succeeded or not.
> 
> This allows to replace color check and transition operations with a
> single transition operation. For example:
> 
> if (IsWhite(object)) {
>   WhiteToBlack(object);
>   Foo();
> }
> 
> becomes
> 
> if (WhiteToBlack(object)) {
>   Foo();
> }
> 
> BUG=chromium:694255
> 
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng
> 
> Review-Url: https://codereview.chromium.org/2860323003
> Cr-Commit-Position: refs/heads/master@{#45123}
> Committed:
https://chromium.googlesource.com/v8/v8/+/c0a65cd295301f334e2bbfcce46a937cd70...

TBR=mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:694255
==========

to

==========
Revert of [heap] Reland "Make non-atomic markbit operations consistent with
atomic ones." (patchset #2 id:20001 of
https://codereview.chromium.org/2860323003/ )

Reason for revert:
box2d failures on buildbot

Original issue's description:
> [heap] Reland "Make non-atomic markbit operations consistent with atomic
ones."
> 
> Now non-atomic color transition operations return a boolean indicating
> whether the transition succeeded or not.
> 
> This allows to replace color check and transition operations with a
> single transition operation. For example:
> 
> if (IsWhite(object)) {
>   WhiteToBlack(object);
>   Foo();
> }
> 
> becomes
> 
> if (WhiteToBlack(object)) {
>   Foo();
> }
> 
> BUG=chromium:694255
> 
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng
> 
> Review-Url: https://codereview.chromium.org/2860323003
> Cr-Commit-Position: refs/heads/master@{#45123}
> Committed:
https://chromium.googlesource.com/v8/v8/+/c0a65cd295301f334e2bbfcce46a937cd70...

TBR=mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:694255

Review-Url: https://codereview.chromium.org/2863953002
Cr-Commit-Position: refs/heads/master@{#45127}
Committed:
https://chromium.googlesource.com/v8/v8/+/b7b3781b8747d597cf0910c65221ad2b188...
==========

[commit-bot: I haz the power, 2017-05-05 11:17:21]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/b7b3781b8747d597cf0910c65221ad2b188...