Moves ash::user::LoginStatus to ash/common

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 8a1158ba1261b28837e7b9183273211a0f8496c2..f2f1ffeba7522bc2eb02f83a8f38ebffe8d900a2 100644
--- a/ash/system/chromeos/supervised/tray_supervised_user.h
+++ b/ash/system/chromeos/supervised/tray_supervised_user.h
@@ -28,9 +28,9 @@ class ASH_EXPORT TraySupervisedUser : public SystemTrayItem,
   void UpdateMessage();
 
   // Overridden from SystemTrayItem.
-  views::View* CreateDefaultView(user::LoginStatus status) override;
+  views::View* CreateDefaultView(LoginStatus status) override;
   void DestroyDefaultView() override;
-  void UpdateAfterLoginStatusChange(user::LoginStatus status) override;
+  void UpdateAfterLoginStatusChange(LoginStatus status) override;
 
   // Overridden from ViewClickListener.
   void OnViewClicked(views::View* sender) override;
@@ -52,7 +52,7 @@ class ASH_EXPORT TraySupervisedUser : public SystemTrayItem,
   LabelTrayView* tray_view_;
 
   // Previous login status to avoid showing notification upon unlock.
-  user::LoginStatus status_;
+  LoginStatus status_;
 
   // Previous user supervised state to avoid showing notification upon unlock.
   bool is_user_supervised_;