chromeos: Refactor ash SystemTrayDelegate enterprise methods to mojo

ash/system/enterprise/tray_enterprise.h

Index: ash/system/enterprise/tray_enterprise.h
diff --git a/ash/system/enterprise/tray_enterprise.h b/ash/system/enterprise/tray_enterprise.h
index 72f044039f2a1010dddfe406b6fcef4fabfa50ef..e7f331a53aef272ecb7c7651c7b5c35b10c6c894 100644
--- a/ash/system/enterprise/tray_enterprise.h
+++ b/ash/system/enterprise/tray_enterprise.h
@@ -14,6 +14,8 @@ namespace ash {
 class LabelTrayView;
 class SystemTray;
 
+// System tray item that shows a message ("This device managed by example.com")
+// in the tray menu for enterprise enrolled devices.
 class TrayEnterprise : public SystemTrayItem,
                        public ViewClickListener,
                        public EnterpriseDomainObserver {
@@ -21,6 +23,8 @@ class TrayEnterprise : public SystemTrayItem,
   explicit TrayEnterprise(SystemTray* system_tray);
   ~TrayEnterprise() override;
 
+  LabelTrayView* tray_view() { return tray_view_; }

[xiyuan, 2017/04/26 19:55:12]

nit: Prevailing style is to put inline accessors after all other methods.

[James Cook, 2017/04/26 21:04:15]

Done.

+
   // If message is not empty updates content of default view, otherwise hides
   // tray items.
   void UpdateEnterpriseMessage();