mash: Migrate some system user files to common.

ash/root_window_controller.cc

 // 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.
 
 #include "ash/root_window_controller.h"
 
 #include <queue>
 #include <vector>
 
 #include "ash/aura/aura_layout_manager_adapter.h"
 #include "ash/aura/wm_shelf_aura.h"
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/ash_constants.h"
 #include "ash/common/ash_switches.h"
 #include "ash/common/focus_cycler.h"
+#include "ash/common/login_status.h"
 #include "ash/common/root_window_controller_common.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/wm/always_on_top_controller.h"
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/dock/docked_window_layout_manager.h"
 #include "ash/common/wm/fullscreen_window_finder.h"
 #include "ash/common/wm/panels/panel_layout_manager.h"
@@ skipping 951 matching lines @@
     aura::Window* primary_root_window = Shell::GetInstance()
                                             ->window_tree_host_manager()
                                             ->GetPrimaryRootWindow();
     return GetRootWindowSettings(primary_root_window)->controller;
   }
 
   return GetRootWindowSettings(root_window)->controller;
 }
 
 }  // namespace ash