[LayoutNG] Update FlagExpectations for LayoutNG

Following bot results are included.
378 379 381 384 389 393 397 401

27 lines were removed by 15 consecutive passes since 341 (Jun 6).

BUG=591099
TBR=eae@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2929393002
Cr-Commit-Position: refs/heads/master@{#479083}
1 file changed