mash: Update LoginStatus with session state updates

ash/shell.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 222 matching lines @@
   // Creates a default views::NonClientFrameView for use by windows in the
   // Ash environment.
   views::NonClientFrameView* CreateDefaultNonClientFrameView(
       views::Widget* widget);
 
   // Sets work area insets of the display containing |window|, pings observers.
   void SetDisplayWorkAreaInsets(aura::Window* window,
                                 const gfx::Insets& insets);
 
   // Called when the user logs in.
+  // TODO(jamescook): Merge this with WmShell::UpdateAfterLoginStatusChange()?
   void OnLoginStateChanged(LoginStatus status);
 
   // Called when the application is exiting.
   void OnAppTerminating();
 
   // Called when the screen is locked (after the lock window is visible) or
   // unlocked.
   void OnLockStateChanged(bool locked);
 
   // Called when a casting session is started or stopped.
@@ skipping 418 matching lines @@
   base::ObserverList<ShellObserver> shell_observers_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_