[LayoutNG] Reaseline pixel difference in text rendering for selection

From yoichio's review for the reuslt 3333.
https://docs.google.com/spreadsheets/d/1anBCj4MpgP4aY1MNJoJjshFl8-V2k4UIco-p-bhK2oQ/edit#gid=0

Excluded 3 tests that look like to have other issues.

NOTRY=true

Bug: 591099
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: I31d0ae6bb10aced5299c18ffce42ba5aaf17272d
Reviewed-on: https://chromium-review.googlesource.com/896664
Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533600}
10 files changed