GitLab

After we finish the scroll unification, the scrolls happens mainly on
the compositor thread, and the scroll code in the main thread will be
removed. eventSender sends the scroll events to main thread, so it
would not work after the scroll unification. We rewrite below tests
fast/scroll-behavior/main-frame-interrupted-scroll.html,
fast/scroll-behavior/overflow-interrupted-scroll.html and
fast/scroll-behavior/subframe-interrupted-scroll.html into browser tests
because we cannot guarantee that the scroll arrives before the animation
completes.

I disable the test when disable_threaded_scrolling_ is false, because we
do not know what is the final scrollTop value.

TBR=bokan@chromium.org

Change-Id: Ia9b68cd2e0c4f198968aa56482698c0c02edf452
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441205Reviewed-by: Lan Wei <lanwei@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812517}