GitLab

During ScrollUnification, scrolling was moved to the compositor
thread. CompositedScrollingMetricTest tests need to be updated to
reflect this so they pass when the ScrollUnification flag is on.

Bug: 1086625
Change-Id: Ib70f4830d8007463228f9dd9b1ac41318b4bada9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2364055
Commit-Queue: Liviu Tinta <liviutinta@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800193}