[LayoutNG] Update FlagExpectations for LayoutNG

Following bot results are included.
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99 lines removed by 21 consecutive passes since 568 (Jun 25.)

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

Review-Url: https://codereview.chromium.org/2960383002
Cr-Commit-Position: refs/heads/master@{#483291}
1 file changed