Revert "chromeos: Move files in //ash/common to //ash, part 3"

ash/common/wm_shell.h

 // Copyright 2016 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_WM_SHELL_H_
-#define ASH_WM_SHELL_H_
+#ifndef ASH_COMMON_WM_SHELL_H_
+#define ASH_COMMON_WM_SHELL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "ash/ash_export.h"
+#include "ash/common/session/session_state_observer.h"
 #include "ash/metrics/gesture_action_type.h"
 #include "ash/metrics/user_metrics_action.h"
-#include "ash/session/session_state_observer.h"
 #include "ash/wm/lock_state_observer.h"
 #include "base/observer_list.h"
 #include "components/ui_devtools/devtools_server.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/compositor/layer_type.h"
 #include "ui/wm/public/activation_change_observer.h"
 #include "ui/wm/public/window_types.h"
 
 namespace app_list {
 class AppList;
@@ skipping 523 matching lines @@
   bool simulate_modal_window_open_for_testing_ = false;
 
   bool added_activation_observer_ = false;
   base::ObserverList<WmActivationObserver> activation_observers_;
 
   scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
 };
 
 }  // namespace ash
 
-#endif  // ASH_WM_SHELL_H_
+#endif  // ASH_COMMON_WM_SHELL_H_