[CompositeAfterPaint] Update layout test expectations

1 new failure: printing/offscreencanvas-2d-printing.html
2 rebaselines: the base test expectations have been rebaselined after
  some change of rendering, leaving the CAP baselines invalid for some
  time (failing on the bot with and without patch). The new baselines
  have just subpixel differences compared to the base test baselines.

Bug: 524134
Change-Id: I68b4e70739f9f6a4618badcdc12994af267c71e5
Reviewed-on: https://chromium-review.googlesource.com/c/1477349
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633355}
3 files changed