Revert "Move some scroll invalidations to the paint invalidation phase"

This reverts commit 11871f14944c99fa718abfc12226ddc8d1da71a8.

Revert "Auto-rebaseline for r181475"

This reverts commit ccabe1281427cc3be9c2708bbdbfaba8ab7bd087.

These CLs mayb have broken a LOT of Mac pixel tests. I will watch the
bots...

TBR=jchaffraix@chromium.org, keishi

Review URL: https://codereview.chromium.org/543203004

git-svn-id: svn://svn.chromium.org/blink/trunk@181483 bbb929c8-8fbe-4397-9dbb-9b2b20218538