ash: Merge LoginStatus update code path

ash/wm/lock_state_controller.h

Index: ash/wm/lock_state_controller.h
diff --git a/ash/wm/lock_state_controller.h b/ash/wm/lock_state_controller.h
index 00b49e81cf63c0ffef4b24cb9d75ce5311a34d4f..96b15cc1987c8199a145487a8f329ed8cf3705fd 100644
--- a/ash/wm/lock_state_controller.h
+++ b/ash/wm/lock_state_controller.h
@@ -122,7 +122,6 @@ class ASH_EXPORT LockStateController : public aura::WindowTreeHostObserver,
   void OnHostCloseRequested(const aura::WindowTreeHost* host) override;
 
   // ShellObserver overrides:
-  void OnLoginStateChanged(LoginStatus status) override;
   void OnAppTerminating() override;
   void OnLockStateChanged(bool locked) override;
 
@@ -199,9 +198,6 @@ class ASH_EXPORT LockStateController : public aura::WindowTreeHostObserver,
 
   std::unique_ptr<SessionStateAnimator> animator_;
 
-  // The current login status, or original login status from before we locked.
-  LoginStatus login_status_;
-
   // Current lock status.
   bool system_is_locked_;