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The tests were reenabled in https://crrev.com/c/1362814 but started to
flake again. Probably for a different reason but the tests have changed
a lot since, so disabling is easier wrt conflicts and keeps any
possible improvements.

TBR=achuith@chromium.org

Bug: 891484, 891277
Change-Id: Id046f7bf0558dcd98c4e0c06dc71049feb938a3d
Reviewed-on: https://chromium-review.googlesource.com/c/1373822Reviewed-by: Friedrich Horschig [CET] <fhorschig@chromium.org>
Commit-Queue: Friedrich Horschig [CET] <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615894}