GitLab

Allocate multiple objects at a time for the thread at a time.
This is meant to amortize allocation costs.

Bug: 998048
Change-Id: I837216fcb3cb76302a6d09e7890b52313ebf8fa2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2562302
Commit-Queue: Benoit L <lizeb@chromium.org>
Reviewed-by: Bartek Nowierski <bartekn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832357}