Eliminate NetworkManagerChanged

ash/system/chromeos/network/tray_network_state_observer.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_NETWORK_STATE_OBSERVER_H
 #define ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 16 matching lines @@
 
    protected:
     virtual ~Delegate() {}
   };
 
   explicit TrayNetworkStateObserver(Delegate* delegate);
 
   virtual ~TrayNetworkStateObserver();
 
   // NetworkStateHandlerObserver overrides.
-  virtual void NetworkManagerChanged() OVERRIDE;
   virtual void NetworkListChanged() OVERRIDE;
   virtual void DeviceListChanged() OVERRIDE;
   virtual void DefaultNetworkChanged(
       const chromeos::NetworkState* network) OVERRIDE;
   virtual void NetworkPropertiesUpdated(
       const chromeos::NetworkState* network) OVERRIDE;
 
  private:
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayNetworkStateObserver);
 };
 
 }  // namespace ash
 }  // namespace internal
 
 #endif  // ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H