Clean up code by removing network traffic code in network library....

chrome/browser/chromeos/login/network_screen.h

 // Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_LOGIN_NETWORK_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_NETWORK_SCREEN_H_
 #pragma once
 
 #include <string>
 
@@ skipping 31 matching lines @@
   // views::Combobox::Listener implementation:
   virtual void ItemChanged(views::Combobox* sender,
                            int prev_index,
                            int new_index);
 
   // views::ButtonListener implementation:
   virtual void ButtonPressed(views::Button* sender, const views::Event& event);
 
   // NetworkLibrary::Observer implementation:
   virtual void NetworkChanged(NetworkLibrary* network_lib);
-  virtual void NetworkTraffic(NetworkLibrary* cros, int traffic_type) {}
 
   // NetworkConfigView::Delegate implementation:
   virtual void OnDialogAccepted();
   virtual void OnDialogCancelled();
 
  protected:
   // Subscribes NetworkScreen to the network change notification,
   // forces refresh of current network state.
   void Refresh();
 
@@ skipping 70 matching lines @@
 
   ScopedRunnableMethodFactory<NetworkScreen> task_factory_;
   LanguageSwitchMenu language_switch_menu_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_NETWORK_SCREEN_H_