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

components/exo/wm_helper_ash.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 COMPONENTS_EXO_WM_HELPER_ASH_H_
 #define COMPONENTS_EXO_WM_HELPER_ASH_H_
 
-#include "ash/shell_observer.h"
+#include "ash/common/shell_observer.h"
 #include "ash/system/accessibility_observer.h"
 #include "base/macros.h"
 #include "components/exo/wm_helper.h"
 #include "ui/aura/client/cursor_client_observer.h"
 #include "ui/aura/client/focus_change_observer.h"
 #include "ui/events/devices/input_device_event_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
 namespace exo {
 
@@ skipping 51 matching lines @@
   // Overriden from ui::InputDeviceEventObserver:
   void OnKeyboardDeviceConfigurationChanged() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WMHelperAsh);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_WM_HELPER_H_