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

2nd review following the same criteria as before; the images
match, or less, by reviewing build 8068.

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

Bug: 591099
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I6da3c540b87a0d30974d6f825f23c026a03a0486
Reviewed-on: https://chromium-review.googlesource.com/1141755
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576021}
34 files changed