Remove some test suppressions where it is not clear why they exist.

Bug: 843511
Change-Id: I946798560e0ba54d22123d86c90507e0d9c9c7da
Reviewed-on: https://chromium-review.googlesource.com/1099430
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567254}
8 files changed