Eliminate ash::internal namespace

ash/system/chromeos/network/tray_vpn.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_SYSTEM_CHROMEOS_NETWORK_TRAY_VPN_H
 #define ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_VPN_H
 
 #include "ash/system/chromeos/network/tray_network_state_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace ash {
-namespace internal {
-
 class TrayNetworkStateObserver;
 
 namespace tray {
 class NetworkDetailedView;
 class VpnDefaultView;
 class VpnDetailedView;
 }
 
 class TrayVPN : public SystemTrayItem,
                 public TrayNetworkStateObserver::Delegate {
@@ skipping 18 matching lines @@
       const chromeos::NetworkState* network) OVERRIDE;
 
  private:
   tray::VpnDefaultView* default_;
   tray::NetworkDetailedView* detailed_;
   scoped_ptr<TrayNetworkStateObserver> network_state_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayVPN);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_VPN_H