Revert 126700 because it broke clang on chromeos.

ash/system/network/tray_network.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_NETWORK_TRAY_NETWORK_H
 #define ASH_SYSTEM_NETWORK_TRAY_NETWORK_H
 #pragma once
 
 #include "ash/system/network/network_controller.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace ash {
 namespace internal {
 
 namespace tray {
 class NetworkDefaultView;
-class NetworkDetailedView;
 class NetworkTrayView;
 }
 
 class TrayNetwork : public SystemTrayItem,
                     public NetworkController {
  public:
   TrayNetwork();
   virtual ~TrayNetwork();
 
  private:
   // Overridden from SystemTrayItem.
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
   virtual void DestroyTrayView() OVERRIDE;
   virtual void DestroyDefaultView() OVERRIDE;
   virtual void DestroyDetailedView() OVERRIDE;
 
   // Overridden from NetworkController.
   virtual void OnNetworkRefresh(const NetworkIconInfo& info) OVERRIDE;
 
   scoped_ptr<tray::NetworkTrayView> tray_;
   scoped_ptr<tray::NetworkDefaultView> default_;
-  scoped_ptr<tray::NetworkDetailedView> detailed_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayNetwork);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_NETWORK_TRAY_NETWORK_H