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

chrome/browser/chromeos/status/network_menu_button.h

 // Copyright (c) 2006-2008 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_BUTTON_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_BUTTON_H_
 #pragma once
 
 #include "app/throb_animation.h"
 #include "base/timer.h"
@@ skipping 51 matching lines @@
   void SetBadge(const SkBitmap& badge) { badge_ = badge; }
   SkBitmap badge() const { return badge_; }
 
  protected:
   // StatusAreaButton implementation.
   virtual void DrawIcon(gfx::Canvas* canvas);
 
   // NetworkMenu implementation:
   virtual bool IsBrowserMode() const;
   virtual gfx::NativeWindow GetNativeWindow() const;
-  virtual void OpenButtonOptions() const;
+  virtual void OpenButtonOptions();
   virtual bool ShouldOpenButtonOptions() const;
 
  private:
   // The status area host,
   StatusAreaHost* host_;
 
   // A badge icon displayed on top of the icon.
   SkBitmap badge_;
 
   // The throb animation that does the wifi connecting animation.
   ThrobAnimation animation_connecting_;
 
   // The duration of the icon throbbing in milliseconds.
   static const int kThrobDuration;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkMenuButton);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_NETWORK_MENU_BUTTON_H_