Reland of "[heap] Concurrency support for heap book-keeping info"

Reland of "[heap] Concurrency support for heap book-keeping info"

Adds concurrency support for:
- MemoryChunk: Fragmentation counters
- MemoryChunk: High-water mark
- MemoryAllocator: Lowest and highest ever allocated addresses, size, and
  capacity

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

This reverts commit 0db34dbe8111f8670c82bb4c42110400a9050d08.

BUG=

Committed: https://crrev.com/6209753c74ee81f8310f4009bf30cade6b88b214
Cr-Commit-Position: refs/heads/master@{#30760}

[Michael Lippautz, 2015-09-16 08:12:31]

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

[commit-bot: I haz the power, 2015-09-16 08:12:38]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1346973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1346973002/1

[Hannes Payer (out of office), 2015-09-16 08:13:10]

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

[Hannes Payer (out of office), 2015-09-16 08:13:10]

lgtm

[commit-bot: I haz the power, 2015-09-16 08:14:09]

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

[commit-bot: I haz the power, 2015-09-16 08:14:10]

Dry run: Try jobs failed on following builders:
  v8_linux64_asan_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel/builds/...)

[Michael Lippautz, 2015-09-16 08:18:31]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2015-09-16 08:18:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1346973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1346973002/1

[commit-bot: I haz the power, 2015-09-16 08:20:01]

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

[commit-bot: I haz the power, 2015-09-16 08:20:02]

Try jobs failed on following builders:
  v8_linux64_asan_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel/builds/...)
  v8_mac_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_mac_rel/builds/9766)

[Michael Lippautz, 2015-09-16 08:26:08]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2015-09-16 08:26:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1346973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1346973002/1

[commit-bot: I haz the power, 2015-09-16 08:27:51]

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

[commit-bot: I haz the power, 2015-09-16 08:27:51]

Try jobs failed on following builders:
  v8_android_arm_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_android_arm_compile_rel/...)
  v8_linux64_asan_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_asan_rel/builds/...)

[Michael Lippautz, 2015-09-16 10:40:54]

The CQ bit was checked by mlippautz@chromium.org

[commit-bot: I haz the power, 2015-09-16 10:41:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1346973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1346973002/1

[commit-bot: I haz the power, 2015-09-16 11:18:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-16 11:18:38]

Patchset 1 (id:??) landed as
https://crrev.com/6209753c74ee81f8310f4009bf30cade6b88b214
Cr-Commit-Position: refs/heads/master@{#30760}