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

ash/system/tray/system_tray.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_TRAY_SYSTEM_TRAY_H_
-#define ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_H_
+#ifndef ASH_SYSTEM_TRAY_SYSTEM_TRAY_H_
+#define ASH_SYSTEM_TRAY_SYSTEM_TRAY_H_
 
 #include <map>
 #include <memory>
 #include <vector>
 
 #include "ash/ash_export.h"
-#include "ash/common/system/tray/system_tray_bubble.h"
-#include "ash/common/system/tray/tray_background_view.h"
+#include "ash/system/tray/system_tray_bubble.h"
+#include "ash/system/tray/tray_background_view.h"
 #include "base/macros.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 #include "ui/views/view.h"
 
 namespace ash {
 
 class KeyEventWatcher;
 enum class LoginStatus;
 class ScreenTrayItem;
 class SystemBubbleWrapper;
@@ skipping 221 matching lines @@
 
   std::unique_ptr<KeyEventWatcher> key_event_watcher_;
 
   std::unique_ptr<ActivationObserver> activation_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTray);
 };
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_H_
+#endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_H_