replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/network/tray_vpn.cc

 // 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.
 
 #include "ash/system/chromeos/network/tray_vpn.h"
 
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/chromeos/network/network_state_list_detailed_view.h"
@@ skipping 49 matching lines @@
       ui::network_icon::NetworkIconAnimation::GetInstance()->AddObserver(this);
     else
       ui::network_icon::NetworkIconAnimation::GetInstance()->RemoveObserver(
           this);
     SetImage(&image);
     SetLabel(label);
     SetAccessibleName(label);
   }
 
   // ui::network_icon::AnimationObserver
-  virtual void NetworkIconChanged() OVERRIDE {
+  virtual void NetworkIconChanged() override {
     Update();
   }
 
  private:
   void GetNetworkStateHandlerImageAndLabel(gfx::ImageSkia* image,
                                            base::string16* label,
                                            bool* animating) {
     NetworkStateHandler* handler =
         NetworkHandler::Get()->network_state_handler();
     const NetworkState* vpn =
@@ skipping 95 matching lines @@
       detailed_->ManagerChanged();
   }
 }
 
 void TrayVPN::NetworkServiceChanged(const chromeos::NetworkState* network) {
   if (detailed_)
     detailed_->NetworkServiceChanged(network);
 }
 
 }  // namespace ash