[LayoutNG] flag-specific rebaseline for image failures

By reviewing results of build 8137 after some test fixes.

TBR=eae@chromium.org
NOTRY=true

Bug: 591099
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: Icc5162d94003c6dd6e0e2913fd739f57343195ab
Reviewed-on: https://chromium-review.googlesource.com/1144810
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576801}
5 files changed