GitLab

This reverts commit 79b4e301.

Reason for revert: Suspected cause of test failures on android-lollipop-arm-rel:

https://ci.chromium.org/ui/p/chromium/builders/ci/android-lollipop-arm-rel/5950/overview

ThreadCacheTest.PeriodicPurgeStopsAndRestarts
../../base/allocator/partition_allocator/thread_cache_unittest.cc:525: Failure
Value of: ThreadCacheRegistry::Instance().has_pending_purge_task()
  Actual: false
Expected: true

Original change's description:
> [PartitionAlloc] Don't perform expensive allocations to fill the thread cache.
>
> Bug: 998048
> Change-Id: Ie18db70f78188e4541aa4d5a0f44da2ce166524e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2569664
> Commit-Queue: Benoit L <lizeb@chromium.org>
> Reviewed-by: Bartek Nowierski <bartekn@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#833771}

TBR=lizeb@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com,bartekn@chromium.org

Change-Id: I2a9cbb1bbd2b4ca3eae9580c510f88f05edeadb0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 998048
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2575003Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833833}