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Always turn on surface synchronization when the --enable-viz flag is
present. Disable a few extra tests which now fail in the new
configuration.

The --enable-surface-synchronization flag was added to an FYI trybot to
check for failures. No failures were observed over the weekend. Remove
the now unneeded flag from the FYI trybot.

Bug: 793302
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: I6bc0aff21d968ba5ee38f7453fbd7b5779efb34a
Reviewed-on: https://chromium-review.googlesource.com/812409
Commit-Queue: kylechar <kylechar@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523685}