Remove all atomic access from store buffer.

Remove all atomic access from store buffer.

Store buffer does not contain stale pointers anymore. Hence, sweeper threads and store buffer processing does not collide.

BUG=

Committed: https://crrev.com/497927927125e6af9461848b70f0830b7bc1da99
Cr-Commit-Position: refs/heads/master@{#27217}

[Hannes Payer (out of office), 2015-03-16 10:54:21]

hpayer@chromium.org changed reviewers:
+ jarin@chromium.org

[Jarin, 2015-03-16 11:32:59]

lgtm.

https://codereview.chromium.org/1007273002/diff/1/src/heap/store-buffer.cc
File src/heap/store-buffer.cc (right):

https://codereview.chromium.org/1007273002/diff/1/src/heap/store-buffer.cc#ne...
src/heap/store-buffer.cc:435: // which may be touched by the concurrent sweeper
thread.
Update (or remove?) the comment, please.

[Hannes Payer (out of office), 2015-03-16 11:55:42]

https://codereview.chromium.org/1007273002/diff/1/src/heap/store-buffer.cc
File src/heap/store-buffer.cc (right):

https://codereview.chromium.org/1007273002/diff/1/src/heap/store-buffer.cc#ne...
src/heap/store-buffer.cc:435: // which may be touched by the concurrent sweeper
thread.
On 2015/03/16 11:32:59, jarin wrote:
> Update (or remove?) the comment, please.

Done.

[Hannes Payer (out of office), 2015-03-16 11:55:45]

The CQ bit was checked by hpayer@chromium.org

[Hannes Payer (out of office), 2015-03-16 11:55:45]

The patchset sent to the CQ was uploaded after l-g-t-m from jarin@chromium.org
Link to the patchset: https://codereview.chromium.org/1007273002/#ps20001
(title: " ")

[commit-bot: I haz the power, 2015-03-16 11:55:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1007273002/20001

[commit-bot: I haz the power, 2015-03-16 12:22:16]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-16 12:22:32]

Patchset 2 (id:??) landed as
https://crrev.com/497927927125e6af9461848b70f0830b7bc1da99
Cr-Commit-Position: refs/heads/master@{#27217}