Reland of "[heap] Uncommit pooled pages concurrently"

Reland of "[heap] Uncommit pooled pages concurrently"

- Move the concurrent unmapping to MemoryAllocator
- Hide (private) members where possible
- MemoryAllocator:Free is now the bottleneck for freeing
- Pooled pages are either allocated from a set of pooled pages are obtained
  through work stealing from the concurrent unmapper

BUG=chromium:605866, chromium:581412
LOG=N

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.

Committed: https://crrev.com/45f52fcb60f75bfe5dc5f6a83317a14db631cf18
Cr-Commit-Position: refs/heads/master@{#35910}

[Michael Lippautz, 2016-04-27 13:10:55]

Description was changed from

==========
Reland of "[heap] Uncommit pooled pages concurrently"

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.

BUG=
==========

to

==========
Reland of "[heap] Uncommit pooled pages concurrently"

- Move the concurrent unmapping to MemoryAllocator
- Hide (private) members where possible
- MemoryAllocator:Free is now the bottleneck for freeing
- Pooled pages are either allocated from a set of pooled pages are obtained
  through work stealing from the concurrent unmapper

BUG=chromium:605866, chromium:581412
LOG=N

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.
==========

[Michael Lippautz, 2016-04-27 13:49:45]

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

[Michael Lippautz, 2016-04-27 13:49:45]

ptal -- will only land after Canary on 04/28.

[Hannes Payer (out of office), 2016-04-29 13:55:00]

On 2016/04/27 13:49:45, Michael Lippautz wrote:
> ptal -- will only land after Canary on 04/28.

LGTM

[Michael Lippautz, 2016-04-29 13:56:15]

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

[commit-bot: I haz the power, 2016-04-29 13:56:22]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1929503002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1929503002/20001

[commit-bot: I haz the power, 2016-04-29 14:21:54]

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

[commit-bot: I haz the power, 2016-04-29 14:21:55]

Dry run: This issue passed the CQ dry run.

[Michael Lippautz, 2016-04-29 14:25:42]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2016-04-29 14:25:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1929503002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1929503002/20001

[commit-bot: I haz the power, 2016-04-29 14:27:45]

Description was changed from

==========
Reland of "[heap] Uncommit pooled pages concurrently"

- Move the concurrent unmapping to MemoryAllocator
- Hide (private) members where possible
- MemoryAllocator:Free is now the bottleneck for freeing
- Pooled pages are either allocated from a set of pooled pages are obtained
  through work stealing from the concurrent unmapper

BUG=chromium:605866, chromium:581412
LOG=N

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.
==========

to

==========
Reland of "[heap] Uncommit pooled pages concurrently"

- Move the concurrent unmapping to MemoryAllocator
- Hide (private) members where possible
- MemoryAllocator:Free is now the bottleneck for freeing
- Pooled pages are either allocated from a set of pooled pages are obtained
  through work stealing from the concurrent unmapper

BUG=chromium:605866, chromium:581412
LOG=N

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.
==========

[commit-bot: I haz the power, 2016-04-29 14:27:46]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-01 22:03:57]

Description was changed from

==========
Reland of "[heap] Uncommit pooled pages concurrently"

- Move the concurrent unmapping to MemoryAllocator
- Hide (private) members where possible
- MemoryAllocator:Free is now the bottleneck for freeing
- Pooled pages are either allocated from a set of pooled pages are obtained
  through work stealing from the concurrent unmapper

BUG=chromium:605866, chromium:581412
LOG=N

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.
==========

to

==========
Reland of "[heap] Uncommit pooled pages concurrently"

- Move the concurrent unmapping to MemoryAllocator
- Hide (private) members where possible
- MemoryAllocator:Free is now the bottleneck for freeing
- Pooled pages are either allocated from a set of pooled pages are obtained
  through work stealing from the concurrent unmapper

BUG=chromium:605866, chromium:581412
LOG=N

This reverts commit 25ff296c4c8d35c63255531a86f877f20eeaeb62.

Committed: https://crrev.com/45f52fcb60f75bfe5dc5f6a83317a14db631cf18
Cr-Commit-Position: refs/heads/master@{#35910}
==========

[commit-bot: I haz the power, 2016-05-01 22:03:58]

Patchset 2 (id:??) landed as
https://crrev.com/45f52fcb60f75bfe5dc5f6a83317a14db631cf18
Cr-Commit-Position: refs/heads/master@{#35910}