Enable more browser tests that are passing in single process mash

Bug: none
Change-Id: I92eeb20b32a1127e6b98a7b23d8e4bd40a3e1506
Reviewed-on: https://chromium-review.googlesource.com/c/1313563Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604915}

testing/buildbot/filters/chromeos.single_process_mash.browser_tests.filter

@@ -44,16 +44,11 @@
 # Crashes on exit, even without SingleProcessMash.
 -AffiliationCheck/EnterpriseDeviceAttributesTest.Success/*
 
-# Blub Arc tests.
--Blub/UnaffiliatedArcAllowedTest.ProfileTest/0
--Blub/UnaffiliatedArcAllowedTest.ProfileTest/1
-
 # Flaky.  crbug.com/888188.
 -ChromeSessionManagerTest.LoginExistingUsers
 -ChromeSessionManagerTest.PRE_LoginExistingUsers
 
-# Flaky test. crbug.com/880584
-# Not implemented reached in virtual base::i18n::TextDirection content::RenderWidgetHostViewAura::GetTextDirection()
+# Flaky (regardless of Mash). https://crbug.com/873884
 -CrSettingsResetPageTest.All
 
 # Encrypted media tests are failing on Asan/Lsan bot due to memory leak. crbug.com/889993
@@ -88,9 +83,6 @@
 # Flaky https://crbug.com/887175
 -PrerenderBrowserTest.PrerenderHTML5VideoJs
 
-# Service worker tests.
--ServiceWorkerTestWithJSBindings/ServiceWorkerTest.SWServedBackgroundPageReceivesEvent/*
-
 # Uses ash::LockWindow. https://crbug.com/899862
 -ShutdownPolicyLockerTest.*