[heap] Reland Use atomic marking operations in incremental marking if

[heap] Reland Use atomic marking operations in incremental marking if
concurrent marking is enabled.

This patch adds kAtomicity flag to IncrementalMarking that is set
depending on the concurrent marking compile time flag.

BUG=chromium:694255
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng

Review-Url: https://codereview.chromium.org/2858343003
Cr-Commit-Position: refs/heads/master@{#45138}
Committed: https://chromium.googlesource.com/v8/v8/+/b1d96fa1d410b2b7cfdff6131517dbf5cbfadc20

[ulan, 2017-05-05 09:35:09]

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

[ulan, 2017-05-05 09:35:10]

Relanding without any changes from the original CL because the CL was revert due
to dependency with another CL.

[Michael Lippautz, 2017-05-05 09:39:13]

lgtm

[ulan, 2017-05-05 11:06:38]

The CQ bit was checked by ulan@chromium.org

[ulan, 2017-05-05 11:06:39]

The patchset sent to the CQ was uploaded after l-g-t-m from
mlippautz@chromium.org
Link to the patchset: https://codereview.chromium.org/2858343003/#ps20001
(title: "ifdef -> if")

[commit-bot: I haz the power, 2017-05-05 11:06:54]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[ulan, 2017-05-05 11:15:59]

The CQ bit was unchecked by ulan@chromium.org

[ulan, 2017-05-05 12:27:24]

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

[commit-bot: I haz the power, 2017-05-05 12:27:27]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[ulan, 2017-05-05 13:14:56]

The CQ bit was checked by ulan@chromium.org

[ulan, 2017-05-05 13:14:56]

The patchset sent to the CQ was uploaded after l-g-t-m from
mlippautz@chromium.org
Link to the patchset: https://codereview.chromium.org/2858343003/#ps60001
(title: "rebase")

[commit-bot: I haz the power, 2017-05-05 13:15:05]

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 13:59:33]

CQ is committing da patch.

Bot data: {"patchset_id": 60001, "attempt_start_ts": 1493990096387630,
"parent_rev": "b9cebf8c9edae76c7036ef5090e5040d000576c4", "commit_rev":
"b1d96fa1d410b2b7cfdff6131517dbf5cbfadc20"}

[commit-bot: I haz the power, 2017-05-05 13:59:39]

Description was changed from

==========
[heap] Reland Use atomic marking operations in incremental marking if
concurrent marking is enabled.

This patch adds kAtomicity flag to IncrementalMarking that is set
depending on the concurrent marking compile time flag.

BUG=chromium:694255
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng
==========

to

==========
[heap] Reland Use atomic marking operations in incremental marking if
concurrent marking is enabled.

This patch adds kAtomicity flag to IncrementalMarking that is set
depending on the concurrent marking compile time flag.

BUG=chromium:694255
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng

Review-Url: https://codereview.chromium.org/2858343003
Cr-Commit-Position: refs/heads/master@{#45138}
Committed:
https://chromium.googlesource.com/v8/v8/+/b1d96fa1d410b2b7cfdff6131517dbf5cbf...
==========

[commit-bot: I haz the power, 2017-05-05 13:59:41]

Committed patchset #4 (id:60001) as
https://chromium.googlesource.com/v8/v8/+/b1d96fa1d410b2b7cfdff6131517dbf5cbf...