cros: Disable some flaky mash_browser_tests

I left them commented out in the filter file because they do work, they
just seem to trip flaky failures that are not particularly related to
the code under test.

Bug: 781391, 783450
Test: browser_tests --mash
Change-Id: I293c5e4ecb41b35a9effd9ced8d8b5773e7f49d9
Reviewed-on: https://chromium-review.googlesource.com/762336
Commit-Queue: James Cook <jamescook@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#515358}

testing/buildbot/filters/mash.browser_tests.filter

@@ -15,7 +15,8 @@ CrashRestoreComplexTest.*
 CrashRestoreSimpleTest.*
 DriveIntegrationServiceBrowserTest.*
 EnterpriseEnrollmentTest.*
-EulaTest.*
+# Works, but flaky CHECK in TransportIdForWindow(). http://crbug.com/781391
+# EulaTest.*
 KioskAppManagerTest.*
 KioskAppUpdateServiceTest.*
 LoginPromptBrowserTest.*
@@ -31,7 +32,8 @@ ShutdownPolicyLockerTest.*
 UpdateScreenTest.*
 UserImageManagerTest.*
 UserSelectionScreenTest.*
-WebviewLoginTest.*
+# Works, but flaky CHECK in TransportIdForWindow(). http://crbug.com/781391
+# WebviewLoginTest.*
 
 # Tests from //chrome/browser/ui/ash.
 AcceleratorCommandsFullscreenBrowserTest.*

testing/buildbot/filters/mojo.fyi.mash.browser_tests.filter

@@ -15,8 +15,10 @@ CrashRestoreComplexTest.*
 CrashRestoreSimpleTest.*
 DriveIntegrationServiceBrowserTest.*
 EnterpriseEnrollmentTest.*
-EulaTest.*
-KioskAppManagerTest.*
+# Works, but flaky CHECK in TransportIdForWindow(). http://crbug.com/781391
+# EulaTest.*
+# Works, but flaky timeouts. http://crbug.com/783450
+# KioskAppManagerTest.*
 KioskAppUpdateServiceTest.*
 LoginPromptBrowserTest.*
 LoginUtilsTest.*
@@ -31,7 +33,8 @@ ShutdownPolicyLockerTest.*
 UpdateScreenTest.*
 UserImageManagerTest.*
 UserSelectionScreenTest.*
-WebviewLoginTest.*
+# Works, but flaky CHECK in TransportIdForWindow(). http://crbug.com/781391
+# WebviewLoginTest.*
 
 # Tests from //chrome/browser/ui/ash.
 AcceleratorCommandsFullscreenBrowserTest.*