More fallout from https://chromium-review.googlesource.com/c/chromium/src/+/1377519:

 - used rebaseline-cl to pull in results from patch set 10
 - rebaselined CL (patch set 12) is still failing on linux_layout_tests_layout_ng & linux_layout_tests_composite_after_paint

Looks like these bots are a) not triggered and b) not rebaselined, even though they have flag-specific expectations checked in:

  third_party/blink/web_tests/flag-specific/enable-blink-features=LayoutNG/
  third_party/blink/web_tests/flag-specific/enable-blink-features=CompositeAfterPaint/

Not sure how to rebaseline these other than manually, at this point.