Add proxy settings to network control at upper row of controls at login screen.

chrome/browser/chromeos/status/network_menu.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_STATUS_NETWORK_MENU_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 109 matching lines @@
   // This returns different colored bars depending on cellular data left.
   static SkBitmap IconForNetworkStrength(const CellularNetwork* cellular);
 
   // This method will convert the |icon| bitmap to the correct size for display.
   // If the |badge| icon is not empty, it will draw that on top of the icon.
   static SkBitmap IconForDisplay(SkBitmap icon, SkBitmap badge);
 
  protected:
   virtual bool IsBrowserMode() const = 0;
   virtual gfx::NativeWindow GetNativeWindow() const = 0;
-  virtual void OpenButtonOptions() const = 0;
+  virtual void OpenButtonOptions() = 0;
   virtual bool ShouldOpenButtonOptions() const = 0;
 
   // Notify subclasses that connection to |network| was initiated.
   virtual void OnConnectNetwork(const Network* network,
                                 SkBitmap selected_icon_) {}
   // Update the menu (e.g. when the network list or status has changed).
   void UpdateMenu();
 
  private:
   enum MenuItemFlags {
@@ skipping 73 matching lines @@
 
   // If true, call into the settings UI for network configuration dialogs.
   bool use_settings_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkMenu);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_H_