cros: Enable AccessibilityManagerTest in mash_browser_tests

Now that ChromeVoxPanel speaks mojo we can enable the following tests:
 AccessibilityManagerTest.AccessibilityMenuVisibility
 AccessibilityManagerTest.ChangingTypePrefInvokesNotification
 AccessibilityManagerTest.ChangingTypeInvokesNotification
 AccessibilityManagerTest.TypePref
 AccessibilityManagerLoginTest.BrailleOnLoginScreen
 AccessibilityManagerLoginTest.Login
 UserTypeInstantiation/AccessibilityManagerUserTypeTest.BrailleWhenLoggedIn/0
 UserTypeInstantiation/AccessibilityManagerUserTypeTest.BrailleWhenLoggedIn/1
 UserTypeInstantiation/AccessibilityManagerUserTypeTest.BrailleWhenLoggedIn/2
 UserTypeInstantiation/AccessibilityManagerUserTypeLoginTest.EnableOnLoginScreenAndLogin/0
 UserTypeInstantiation/AccessibilityManagerUserTypeLoginTest.EnableOnLoginScreenAndLogin/1
 UserTypeInstantiation/AccessibilityManagerUserTypeLoginTest.EnableOnLoginScreenAndLogin/2

Update the filter to put the remaining failures in the right sections.

Bug: 628655
Change-Id: Ifd7f9dab36b98c6c9f29beb511a8ddd3b33906af
Reviewed-on: https://chromium-review.googlesource.com/959610Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542921}

testing/buildbot/filters/mash.browser_tests.filter

@@ -11,13 +11,7 @@
 -InitiallyRestored/AcceleratorCommandsFullscreenBrowserTest.*
 -InitiallyRestored/AcceleratorCommandsPlatformAppFullscreenBrowserTest.*
 
-# ChromeVoxPanel directly calls into ash to set panel height.
-# http://crbug.com/628655
--AccessibilityManagerTest.*
--PolicyTest.ScreenMagnifierTypeFull
--PolicyTest.ScreenMagnifierTypeNone
--PolicyTest.UnifiedDesktopEnabledByDefault
--UserTypeInstantiation/AccessibilityManagerUserTypeTest.*
+# Volume adjustment fails.
 -WizardControllerTest.*ChromeVox
 
 # Login constructs ash::FocusRingController and KeyboardDrivenOobeKeyHandler,
@@ -129,6 +123,9 @@
 -PolicyDisplayRotationDefault/DisplayRotationBootTest.*
 -PolicyDisplayRotationDefault/DisplayRotationDefaultTest.*
 
+# ash::Shell::display_manager() to get display state.
+-PolicyTest.UnifiedDesktopEnabledByDefault
+
 # Failures JS-side.
 -GalleryBrowserTest.*
 -GalleryBrowserTestInGuestMode.*
@@ -168,6 +165,8 @@
 # CalledOnValidSequence() from SchedulerWorkerDelegate::OnMainExit
 -LoginScreenDefaultPolicyInSessionBrowsertest.*
 -LoginScreenDefaultPolicyLoginScreenBrowsertest.*
+-PolicyTest.ScreenMagnifierTypeFull
+-PolicyTest.ScreenMagnifierTypeNone
 
 # Crashes in pre-login phase, probably MagnificationManager not created.
 -MagnificationManagerTest.*
@@ -240,6 +239,7 @@
 -UserAddingScreenTest.*
 
 # Virtual keyboard not supported.
+-AccessibilityManagerLoginTest.ResumeSavedPref
 -DefaultKeyboardExtensionBrowserTest.*
 -KeyboardEndToEndTest.*
 -KioskVirtualKeyboardTest.*