Convert TrayEventFilter to wm common types

Convert TrayEventFilter to wm common types

* Use WmShell for PointerWatcher access
* Remove unused includes of ash/root_window_controller.h
* Disallow ash/root_window_controller.h usage in ash/system/tray via DEPS
* Remove ContainerDelegate, which is now unused

This cannot move to //ash/common yet because it has dependencies on
TrayBackgroundView.

BUG=619636
TEST=ash_unittests, manual tests that the system tray bubble closes when you
click outside it, but does not close if you click on a notification

Committed: https://crrev.com/5071557339d01da7d2d39f9040cf7e79e89c1adc
Cr-Commit-Position: refs/heads/master@{#401188}

[James Cook, 2016-06-21 21:15:05]

Description was changed from

==========
Convert TrayEventFilter to wm common types

* Use WmShell for PointerWatcher access
* Remove unused includes of ash/root_window_controller.h
* Disallow ash/root_window_controller.h usage in ash/system/tray via DEPS

This cannot move to //ash/common yet because it has dependencies on
TrayBackgroundView.

BUG=619636
TEST=ash_unittests, manual tests that the system tray bubble closes when you
click outside it, but does not close if you click on a notification
==========

to

==========
Convert TrayEventFilter to wm common types

* Use WmShell for PointerWatcher access
* Remove unused includes of ash/root_window_controller.h
* Disallow ash/root_window_controller.h usage in ash/system/tray via DEPS
* Remove ContainerDelegate, which is now unused

This cannot move to //ash/common yet because it has dependencies on
TrayBackgroundView.

BUG=619636
TEST=ash_unittests, manual tests that the system tray bubble closes when you
click outside it, but does not close if you click on a notification
==========

[James Cook, 2016-06-21 21:30:36]

jamescook@chromium.org changed reviewers:
+ msw@chromium.org

[James Cook, 2016-06-21 21:30:37]

msw, please take a look. (Finally, a CL that removes more than it adds!)

[msw, 2016-06-21 22:38:32]

nice; lgtm

[James Cook, 2016-06-21 23:20:19]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2016-06-21 23:20:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2086143002/40001

[commit-bot: I haz the power, 2016-06-22 01:11:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-06-22 01:11:47]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[James Cook, 2016-06-22 01:51:12]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2016-06-22 01:52:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2086143002/40001

[commit-bot: I haz the power, 2016-06-22 03:11:24]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-06-22 03:13:30]

Description was changed from

==========
Convert TrayEventFilter to wm common types

* Use WmShell for PointerWatcher access
* Remove unused includes of ash/root_window_controller.h
* Disallow ash/root_window_controller.h usage in ash/system/tray via DEPS
* Remove ContainerDelegate, which is now unused

This cannot move to //ash/common yet because it has dependencies on
TrayBackgroundView.

BUG=619636
TEST=ash_unittests, manual tests that the system tray bubble closes when you
click outside it, but does not close if you click on a notification
==========

to

==========
Convert TrayEventFilter to wm common types

* Use WmShell for PointerWatcher access
* Remove unused includes of ash/root_window_controller.h
* Disallow ash/root_window_controller.h usage in ash/system/tray via DEPS
* Remove ContainerDelegate, which is now unused

This cannot move to //ash/common yet because it has dependencies on
TrayBackgroundView.

BUG=619636
TEST=ash_unittests, manual tests that the system tray bubble closes when you
click outside it, but does not close if you click on a notification

Committed: https://crrev.com/5071557339d01da7d2d39f9040cf7e79e89c1adc
Cr-Commit-Position: refs/heads/master@{#401188}
==========

[commit-bot: I haz the power, 2016-06-22 03:13:31]

Patchset 3 (id:??) landed as
https://crrev.com/5071557339d01da7d2d39f9040cf7e79e89c1adc
Cr-Commit-Position: refs/heads/master@{#401188}