This reverts commit aea4f1a7.

Reason: performance regression on benchmarks (crbug.com/671118).

BUG=chromium:671118,chromium:613518
TBR=hpayer@chromium.org

Review-Url: https://codereview.chromium.org/2549053002
Cr-Commit-Position: refs/heads/master@{#41479}