I'll start looking at these.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec

commit 9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec
Author: jamescook <jamescook@chromium.org>
Date: Wed Oct 12 19:28:50 2016

mash: Port TrayUpdateTest to AshTest

* Add AshTest::GetPrimarySystemTray().
* Set a TestSystemTrayDelegate in mash unittests because this test relies on
there not being an update available at test start, but SystemTrayDelegateMus
is based on DefaultSystemTrayDelegate, which simulates an update being ready.

BUG= 654495 
TEST=ash_unittests, mash_unittests

Review-Url: https://codereview.chromium.org/2408273002
Cr-Commit-Position: refs/heads/master@{#424822}

[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/BUILD.gn
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/BUILD.gn
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/system/update/tray_update_unittest.cc
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/test/BUILD.gn
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/test/ash_test.cc
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/test/ash_test.h
[add] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/test/wm_shell_test_api.cc
[add] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/test/wm_shell_test_api.h
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/wm_shell.cc
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/common/wm_shell.h
[modify] https://crrev.com/9d7d8eafd909e356d87b94e3fd2fc7e3d7d78aec/ash/mus/test/wm_test_helper.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/662f55a483bd54e2566782d9b064d70cd7eb210a

commit 662f55a483bd54e2566782d9b064d70cd7eb210a
Author: jamescook <jamescook@chromium.org>
Date: Thu Oct 13 04:30:30 2016

mash: Convert TimeViewTest to AshTest

It only has ash/common dependencies.

BUG= 654495 
TEST=ash_unittests, mash_unittests

Review-Url: https://codereview.chromium.org/2411923002
Cr-Commit-Position: refs/heads/master@{#424957}

[modify] https://crrev.com/662f55a483bd54e2566782d9b064d70cd7eb210a/ash/BUILD.gn
[modify] https://crrev.com/662f55a483bd54e2566782d9b064d70cd7eb210a/ash/common/BUILD.gn
[modify] https://crrev.com/662f55a483bd54e2566782d9b064d70cd7eb210a/ash/common/system/date/date_view_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d0ded2732e3832c3b1b060098330cf14096c4342

commit d0ded2732e3832c3b1b060098330cf14096c4342
Author: jamescook <jamescook@chromium.org>
Date: Fri Oct 14 17:46:30 2016

mustash: Convert TraySupervisedUserTest to AshTest

It only uses common types.

* Add AshTest::GetSystemTrayDelegate, which is used in about 10 places in
other tests.
* Reset the initial login status directly in this test. This is the only
call site for SetInitialLoginStatus(). Continuing to do it in AshTestHelper
would mean I would have to duplicate that call in WmTestHelper, which seems
worse than what I did here.

BUG= 654495 
TEST=ash_unittests, mash_unittests

Review-Url: https://codereview.chromium.org/2420783002
Cr-Commit-Position: refs/heads/master@{#425382}

[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/BUILD.gn
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/common/BUILD.gn
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/common/system/chromeos/supervised/tray_supervised_user_unittest.cc
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/common/test/ash_test.cc
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/common/test/ash_test.h
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/common/test/test_system_tray_delegate.cc
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/common/test/test_system_tray_delegate.h
[modify] https://crrev.com/d0ded2732e3832c3b1b060098330cf14096c4342/ash/test/ash_test_helper.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/88e3718e8d9b4a20b112ec5258739619d085f6f8

commit 88e3718e8d9b4a20b112ec5258739619d085f6f8
Author: jamescook <jamescook@chromium.org>
Date: Fri Oct 14 19:05:19 2016

mutash: Convert ScreenShareTest/ScreenCaptureTest to AshTest

The conversion is mechanical, but exposed the fact that we initialize
chromeos::NetworkHandler in mash_unittests but do not in ash_unittests.
This exposed a crash in the TrayVpn code. Since initializing NetworkHandler
more closely matches how ash runs in production, I chose to skip showing the
VPN tray item if no VPN delegate is available.

BUG= 654495 
TEST=ash_unittests, mash_unittests

Review-Url: https://codereview.chromium.org/2422453002
Cr-Commit-Position: refs/heads/master@{#425412}

[modify] https://crrev.com/88e3718e8d9b4a20b112ec5258739619d085f6f8/ash/BUILD.gn
[modify] https://crrev.com/88e3718e8d9b4a20b112ec5258739619d085f6f8/ash/common/BUILD.gn
[modify] https://crrev.com/88e3718e8d9b4a20b112ec5258739619d085f6f8/ash/common/system/chromeos/network/tray_vpn.cc
[modify] https://crrev.com/88e3718e8d9b4a20b112ec5258739619d085f6f8/ash/common/system/chromeos/screen_security/screen_tray_item_unittest.cc

We can now use AshTestBase for mash, so no point in doing this. James, can this be moved to fixed now?