[LayoutNG] flag-specific rebaselines for paint/invalidation/

By reviewing visually same paint invalidation rectangles
of build 7659.

There are 78 such failures, 13 of them are in this CL.

The rests, 65 of them are ref tests. Need to look into how
they work, and how we can support them in LayoutNG.

TBR=eae@chromium.org, mstensho@chromium.org, atotic@chromium.org
NOTRY=true

Bug: 591099
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I891c127ec517b68370273c7ba49b3c488f88b2d3
Reviewed-on: https://chromium-review.googlesource.com/1128677
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573229}
16 files changed