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

ash/system/network/vpn_list.h

 // Copyright 2015 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_CHROMEOS_NETWORK_VPN_LIST_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_VPN_LIST_H_
+#ifndef ASH_SYSTEM_NETWORK_VPN_LIST_H_
+#define ASH_SYSTEM_NETWORK_VPN_LIST_H_
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/public/interfaces/vpn_list.mojom.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 
@@ skipping 74 matching lines @@
   // other providers added by extensions in the primary user's profile.
   std::vector<VPNProvider> vpn_providers_;
 
   base::ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(VpnList);
 };
 
 }  // namespace ash
 
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_VPN_LIST_H_
+#endif  // ASH_SYSTEM_NETWORK_VPN_LIST_H_