ash: Initialize some pointers to null in SystemTray constructor

ash: Initialize some pointers to null in SystemTray constructor

They eventually get valid pointers assigned, but this makes the code clearer
and prevents spurious warnings from editors (like Eclipse) that detect
constructors with uninitialized data.

BUG=none
TEST=existing ash tests

Committed: https://crrev.com/56f5830b7edd6ea938f70406edcb4e7d03baacad
Cr-Commit-Position: refs/heads/master@{#383891}

[James Cook, 2016-03-30 00:11:08]

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

[James Cook, 2016-03-30 00:11:08]

Steven, PTAL

[stevenjb, 2016-03-30 00:47:57]

lgtm

https://codereview.chromium.org/1838343003/diff/1/ash/system/tray/system_tray.cc
File ash/system/tray/system_tray.cc (right):

https://codereview.chromium.org/1838343003/diff/1/ash/system/tray/system_tray...
ash/system/tray/system_tray.cc:141: screen_share_tray_item_(nullptr) {
Bleh. These probably shouldn't exist, but something for another day. Thanks for
cleaning this up.

[James Cook, 2016-03-30 01:15:58]

The CQ bit was checked by jamescook@chromium.org

[commit-bot: I haz the power, 2016-03-30 01:16:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1838343003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1838343003/1

[commit-bot: I haz the power, 2016-03-30 01:23:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-30 01:25:18]

Description was changed from

==========
ash: Initialize some pointers to null in SystemTray constructor

They eventually get valid pointers assigned, but this makes the code clearer
and prevents spurious warnings from editors (like Eclipse) that detect
constructors with uninitialized data.

BUG=none
TEST=existing ash tests
==========

to

==========
ash: Initialize some pointers to null in SystemTray constructor

They eventually get valid pointers assigned, but this makes the code clearer
and prevents spurious warnings from editors (like Eclipse) that detect
constructors with uninitialized data.

BUG=none
TEST=existing ash tests

Committed: https://crrev.com/56f5830b7edd6ea938f70406edcb4e7d03baacad
Cr-Commit-Position: refs/heads/master@{#383891}
==========

[commit-bot: I haz the power, 2016-03-30 01:25:19]

Patchset 1 (id:??) landed as
https://crrev.com/56f5830b7edd6ea938f70406edcb4e7d03baacad
Cr-Commit-Position: refs/heads/master@{#383891}