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

ash/common/system/date/tray_system_info.h

Index: ash/common/system/date/tray_system_info.h
diff --git a/ash/system/date/tray_system_info.h b/ash/common/system/date/tray_system_info.h
similarity index 86%
rename from ash/system/date/tray_system_info.h
rename to ash/common/system/date/tray_system_info.h
index 6132b7f5a6be80286165dd84221e00129fb196e1..7d5faa4278793493d7adb6dbc7839d1059ef5fc7 100644
--- a/ash/system/date/tray_system_info.h
+++ b/ash/common/system/date/tray_system_info.h
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
-#define ASH_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
+#ifndef ASH_COMMON_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
+#define ASH_COMMON_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/login_status.h"
-#include "ash/system/date/clock_observer.h"
-#include "ash/system/tray/system_tray_item.h"
+#include "ash/common/system/date/clock_observer.h"
+#include "ash/common/system/tray/system_tray_item.h"
 #include "base/macros.h"
 
 namespace views {
@@ -64,4 +64,4 @@ class ASH_EXPORT TraySystemInfo : public SystemTrayItem, public ClockObserver {
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_
+#endif  // ASH_COMMON_SYSTEM_DATE_TRAY_SYSTEM_INFO_H_