mash: Introduce WmSystemTrayNotifier for //ash/common

mash: Introduce WmSystemTrayNotifier for //ash/common

SystemTrayNotifier is a dependency of TrayUpdate, which I am trying to move
to //ash/common.

SystemTrayNotifier has a large number of dependencies, so split out a new
version called WmSystemTrayNotifier where we can port dependencies one by one.

Move update notifications to WmSystemTrayObserver.

BUG=615155
TEST=existing ash_unittests, specifically TrayUpdateTest

Committed: https://crrev.com/9e501c6be0f10c1bbdbc8baea5beb24ff39b08a5
Cr-Commit-Position: refs/heads/master@{#399473}

[James Cook, 2016-06-11 00:02:09]

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

[James Cook, 2016-06-11 00:02:10]

msw, please take a look.

[msw, 2016-06-11 00:20:46]

lgtm

[James Cook, 2016-06-11 23:37:24]

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

[James Cook, 2016-06-11 23:37:24]

stevenjb, can I get OWNERS for
chrome/browser/ui/ash/system_tray_delegate_chromeos.* ?

[stevenjb, 2016-06-13 16:57:26]

lgtm

[James Cook, 2016-06-13 17:18:30]

The CQ bit was checked by jamescook@chromium.org

[James Cook, 2016-06-13 17:18:31]

The patchset sent to the CQ was uploaded after l-g-t-m from msw@chromium.org
Link to the patchset: https://codereview.chromium.org/2060633002/#ps60001
(title: "rebase")

[commit-bot: I haz the power, 2016-06-13 17:19:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2060633002/60001

[commit-bot: I haz the power, 2016-06-13 17:25:00]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-06-13 17:26:50]

Description was changed from

==========
mash: Introduce WmSystemTrayNotifier for //ash/common

SystemTrayNotifier is a dependency of TrayUpdate, which I am trying to move
to //ash/common.

SystemTrayNotifier has a large number of dependencies, so split out a new
version called WmSystemTrayNotifier where we can port dependencies one by one.

Move update notifications to WmSystemTrayObserver.

BUG=615155
TEST=existing ash_unittests, specifically TrayUpdateTest
==========

to

==========
mash: Introduce WmSystemTrayNotifier for //ash/common

SystemTrayNotifier is a dependency of TrayUpdate, which I am trying to move
to //ash/common.

SystemTrayNotifier has a large number of dependencies, so split out a new
version called WmSystemTrayNotifier where we can port dependencies one by one.

Move update notifications to WmSystemTrayObserver.

BUG=615155
TEST=existing ash_unittests, specifically TrayUpdateTest

Committed: https://crrev.com/9e501c6be0f10c1bbdbc8baea5beb24ff39b08a5
Cr-Commit-Position: refs/heads/master@{#399473}
==========

[commit-bot: I haz the power, 2016-06-13 17:26:51]

Patchset 4 (id:??) landed as
https://crrev.com/9e501c6be0f10c1bbdbc8baea5beb24ff39b08a5
Cr-Commit-Position: refs/heads/master@{#399473}