Remove many chromium.memory exceptions.

If we run tests on the main waterfall, we generally should run them
on the memory waterfall as well.

I filed bugs and added comments to those for the few tests that
actually don't pass on the memory waterfall. Most do pass.

Bug: 814403,831667,831674,831676,830653
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I0ea3cf12745f089d7fb87da8fc20e2665d86d53f
Reviewed-on: https://chromium-review.googlesource.com/987916
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550005}
4 files changed