GitLab

cros: Add more tests to mash_browser_tests on main waterfall

Change the filter file from a whitelist to a blacklist. The blacklist
has been in use on the Mojo FYI bots for some time and the test suite
seems stable. This adds ~8000 tests to the bot.

This is part of go/mustash. We run browser_tests --mash on the
linux-chromeos bots to test out-of-process ash sysui.

Bug: 678687
Test: mash_browser_tests
Change-Id: I784990cb1ee4d6241961ca9744248fdbc912a231
Reviewed-on: https://chromium-review.googlesource.com/895906
Commit-Queue: James Cook <jamescook@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536775}