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This test is known to be flaky and a change related to it didn't change
that (see linked bug).

TBR=keishi@chromium.org

Bug: 862589
Change-Id: I3c64042bb3d36c9515d2b1b302d13b85fbbc8034
Reviewed-on: https://chromium-review.googlesource.com/1180963
Commit-Queue: Friedrich Horschig <fhorschig@chromium.org>
Reviewed-by: Friedrich Horschig <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584398}