This reverts commit 3c62f7ae.
(and commit 4939463c)

The goal of this revert is to contrast the effect on perf bots of
landing it vs reverting it to more easily attribute its impact.

R=hpayer@chromium.org

Bug: chromium:812178
Change-Id: I7c977b1b0b587f787263272400d87f6aae7af634
Reviewed-on: https://chromium-review.googlesource.com/936761
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51546}