Issue 695561  has been merged into this issue.

Perhaps obvious note: They fail in --mash too.

Apparently there are some stylus tests that fail on this as well. They use ui::test::DeviceDataManagerTestAPI to fake a stylus eject event.

-PaletteTrayTestWithInternalStylus.WelcomeBubbleShownOnEject
-PaletteTrayTestWithInternalStylus.WelcomeBubbleNotShownIfShownBefore
-PaletteTrayTestWithInternalStylus.WelcomeBubbleNotShownIfAutoOpenPaletteTrue

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6f336c50912b9f4e2e3e8ed401e87461715ab872

commit 6f336c50912b9f4e2e3e8ed401e87461715ab872
Author: James Cook <jamescook@chromium.org>
Date: Wed Oct 25 15:08:19 2017

cros: Fix ui::InputDeviceManager usage for mash

The ash process now has an InputDeviceManager, so we don't need to
check for null or skip tests that use it.

Convert PaletteTrayTests to avoid usage of DeviceDataManagerTestAPI,
since DeviceDataManager doesn't exist on mash.

Bug:  682460 ,  734812 
Test: ash_unittests
Change-Id: If0d75de124af664f530f6cce5af6f95588c8265c
Reviewed-on: https://chromium-review.googlesource.com/735130
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511462}
[modify] https://crrev.com/6f336c50912b9f4e2e3e8ed401e87461715ab872/ash/system/palette/palette_tray_test_api.h
[modify] https://crrev.com/6f336c50912b9f4e2e3e8ed401e87461715ab872/ash/system/palette/palette_tray_unittest.cc
[modify] https://crrev.com/6f336c50912b9f4e2e3e8ed401e87461715ab872/ash/system/power/power_button_display_controller.cc
[modify] https://crrev.com/6f336c50912b9f4e2e3e8ed401e87461715ab872/ash/system/status_area_widget_unittest.cc
[modify] https://crrev.com/6f336c50912b9f4e2e3e8ed401e87461715ab872/testing/buildbot/filters/ash_unittests_mash.filter
[modify] https://crrev.com/6f336c50912b9f4e2e3e8ed401e87461715ab872/testing/buildbot/filters/ash_unittests_mus.filter

I'm near this code, so I'll take a look.

The pure DeviceDataManager ones are fixed. There are still a few disabled because touchscreen calibration doesn't work. I filed  issue 779118  for those.