[heap] Remove store_buffer_counter from MemoryChunk

[heap] Remove store_buffer_counter from MemoryChunk

It is only used locally when exempting pages from the store buffer. This use
case can be replaced with a hashmap at the call site.

BUG=chromium:524425
LOG=N
R=ulan@chromium.org

Committed: https://crrev.com/a89d41f05b523a557152969f0f5c4625af0c8c16
Cr-Commit-Position: refs/heads/master@{#33324}

[Michael Lippautz, 2016-01-15 11:00:42]

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

[commit-bot: I haz the power, 2016-01-15 11:00:45]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1593583002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1593583002/1

[Michael Lippautz, 2016-01-15 11:01:44]

PTAL, this is the part that removes the store_buffer_counter field on our
MemoryChunk. The case gets triggered in the mozilla test suite.

[ulan, 2016-01-15 11:44:23]

lgtm

[commit-bot: I haz the power, 2016-01-15 11:45:26]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-01-15 11:45:27]

Dry run: This issue passed the CQ dry run.

[Michael Lippautz, 2016-01-15 11:48:29]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2016-01-15 11:48:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1593583002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1593583002/1

[commit-bot: I haz the power, 2016-01-15 11:49:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-15 11:50:24]

Description was changed from

==========
[heap] Remove store_buffer_counter from MemoryChunk

It is only used locally when exempting pages from the store buffer. This use
case can be replaced with a hashmap at the call site.

BUG=chromium:524425
LOG=N
R=ulan@chromium.org
==========

to

==========
[heap] Remove store_buffer_counter from MemoryChunk

It is only used locally when exempting pages from the store buffer. This use
case can be replaced with a hashmap at the call site.

BUG=chromium:524425
LOG=N
R=ulan@chromium.org

Committed: https://crrev.com/a89d41f05b523a557152969f0f5c4625af0c8c16
Cr-Commit-Position: refs/heads/master@{#33324}
==========

[commit-bot: I haz the power, 2016-01-15 11:50:24]

Patchset 1 (id:??) landed as
https://crrev.com/a89d41f05b523a557152969f0f5c4625af0c8c16
Cr-Commit-Position: refs/heads/master@{#33324}