Allocation is super slow and produce big performance regression on
blink side.

Bug: chromium:839567,chromium:839809
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I3e9989435515ecfaedaee60c1f0c6939b9053e95
Reviewed-on: https://chromium-review.googlesource.com/1053105
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53115}