chromeos: Move files in //ash/common to //ash, part 1

ash/system/update/tray_update.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_COMMON_SYSTEM_UPDATE_TRAY_UPDATE_H_
-#define ASH_COMMON_SYSTEM_UPDATE_TRAY_UPDATE_H_
+#ifndef ASH_SYSTEM_UPDATE_TRAY_UPDATE_H_
+#define ASH_SYSTEM_UPDATE_TRAY_UPDATE_H_
 
 #include "ash/ash_export.h"
-#include "ash/common/system/tray/tray_image_item.h"
+#include "ash/system/tray/tray_image_item.h"
 #include "base/macros.h"
 
 namespace views {
 class View;
 }
 
 namespace ash {
 
 namespace mojom {
 enum class UpdateSeverity;
@@ skipping 25 matching lines @@
   // all instances.
   static bool update_required_;
   static mojom::UpdateSeverity severity_;
   static bool factory_reset_required_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayUpdate);
 };
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_UPDATE_TRAY_UPDATE_H_
+#endif  // ASH_SYSTEM_UPDATE_TRAY_UPDATE_H_