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

ash/common/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_COMMON_SYSTEM_CHROMEOS_NETWORK_TRAY_VPN_H_
-#define ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_TRAY_VPN_H_
-
-#include <memory>
-
-#include "ash/common/system/chromeos/network/tray_network_state_observer.h"
-#include "ash/common/system/tray/system_tray_item.h"
-#include "base/macros.h"
-
-namespace ash {
-class TrayNetworkStateObserver;
-
-namespace tray {
-class NetworkDetailedView;
-class VpnDefaultView;
-}
-
-class TrayVPN : public SystemTrayItem,
-                public TrayNetworkStateObserver::Delegate {
- public:
-  explicit TrayVPN(SystemTray* system_tray);
-  ~TrayVPN() override;
-
-  // SystemTrayItem
-  views::View* CreateTrayView(LoginStatus status) override;
-  views::View* CreateDefaultView(LoginStatus status) override;
-  views::View* CreateDetailedView(LoginStatus status) override;
-  void DestroyTrayView() override;
-  void DestroyDefaultView() override;
-  void DestroyDetailedView() override;
-  void UpdateAfterLoginStatusChange(LoginStatus status) override;
-  void UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) override;
-
-  // TrayNetworkStateObserver::Delegate
-  void NetworkStateChanged() override;
-
- private:
-  tray::VpnDefaultView* default_;
-  tray::NetworkDetailedView* detailed_;
-  std::unique_ptr<TrayNetworkStateObserver> network_state_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(TrayVPN);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_CHROMEOS_NETWORK_TRAY_VPN_H_