Adding infrastructure for possibility of changing manager names for the supervised accounts.

ash/system/chromeos/supervised/tray_supervised_user.h

Index: ash/system/chromeos/supervised/tray_supervised_user.h
diff --git a/ash/system/chromeos/supervised/tray_supervised_user.h b/ash/system/chromeos/supervised/tray_supervised_user.h
index 5d07d25feb4e5371546f4f861fb12d180bf955a6..00b5b09a8a2453d002e6a804286214d30f954d6a 100644
--- a/ash/system/chromeos/supervised/tray_supervised_user.h
+++ b/ash/system/chromeos/supervised/tray_supervised_user.h
@@ -6,8 +6,10 @@
 #define ASH_SYSTEM_CHROMEOS_SUPERVISED_TRAY_SUPERVISED_USER_H
 
 #include "ash/ash_export.h"
+#include "ash/system/chromeos/supervised/custodian_info_tray_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/view_click_listener.h"
+#include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 
 namespace ash {
@@ -15,7 +17,8 @@ class LabelTrayView;
 class SystemTray;
 
 class ASH_EXPORT TraySupervisedUser : public SystemTrayItem,
-                                      public ViewClickListener {
+                                      public ViewClickListener,
+                                      public CustodianInfoTrayObserver {
  public:
   explicit TraySupervisedUser(SystemTray* system_tray);
   virtual ~TraySupervisedUser();
@@ -32,6 +35,9 @@ class ASH_EXPORT TraySupervisedUser : public SystemTrayItem,
   // Overridden from ViewClickListener.
   virtual void OnViewClicked(views::View* sender) OVERRIDE;
 
+  // Overridden from CustodianInfoTrayObserver:
+  void OnCustodianInfoChanged();
+
  private:
   friend class TraySupervisedUserTest;
 
@@ -39,13 +45,18 @@ class ASH_EXPORT TraySupervisedUser : public SystemTrayItem,
 
   void CreateOrUpdateNotification(const base::string16& new_message);
 
+  void CreateOrUpdateSupervisedWarningNotification();
+
   LabelTrayView* tray_view_;
+
   // Previous login status to avoid showing notification upon unlock.
   user::LoginStatus status_;
 
   // Previous user supervised state to avoid showing notification upon unlock.
   bool is_user_supervised_;
 
+  base::WeakPtrFactory<CustodianInfoTrayObserver> weak_factory_observers_;
+
   DISALLOW_COPY_AND_ASSIGN(TraySupervisedUser);
 };