Update scroll expectations in wheel-and-touch-scroll-use-count.html

This cl uses approx_equals instead of waiting for the scrolltop to get
equal to the precise scroll delta to make the test stable.

Bug: 766357
Change-Id: Ib4d5712fda6dca28a81fce0fbccf4c64f568e8d4
Reviewed-on: https://chromium-review.googlesource.com/c/1459792
Reviewed-by: Sahel Sharify <sahel@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Sahel Sharify <sahel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630405}
1 file changed