chromeos: Move files in //ash/common to //ash

ash/system/date/tray_system_info.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_COMMON_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
-#define ASH_COMMON_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
+#ifndef ASH_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
+#define ASH_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
-#include "ash/common/login_status.h"
-#include "ash/common/system/date/clock_observer.h"
-#include "ash/common/system/tray/system_tray_item.h"
+#include "ash/login_status.h"
+#include "ash/system/date/clock_observer.h"
+#include "ash/system/tray/system_tray_item.h"
 #include "base/macros.h"
 
 namespace views {
 class Label;
 }
 
 namespace ash {
 class SystemClockObserver;
 class SystemInfoDefaultView;
 
@@ skipping 33 matching lines @@
   SystemInfoDefaultView* default_view_;
   LoginStatus login_status_;
 
   std::unique_ptr<SystemClockObserver> system_clock_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TraySystemInfo);
 };
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
+#endif  // ASH_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_