Not resetting the ticks regresses optimization time without substantial
performance benenfits on twitter, facebook, youtube, linkedin and wikipedia.

There was no net positive effect visible otherwise.

Bug: chromium:786908
Change-Id: I98237dee170e7a387f09ccfbad178793361d4a67
Reviewed-on: https://chromium-review.googlesource.com/779435Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49516}