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

chrome/browser/chromeos/status/network_dropdown_button.h

Index: chrome/browser/chromeos/status/network_dropdown_button.h
diff --git a/chrome/browser/chromeos/status/network_dropdown_button.h b/chrome/browser/chromeos/status/network_dropdown_button.h
index 47500f616d90e0cf83464246679fe1514140f7bf..24c09273a58a328a6b52be4e584cb7269b0bc975 100644
--- a/chrome/browser/chromeos/status/network_dropdown_button.h
+++ b/chrome/browser/chromeos/status/network_dropdown_button.h
@@ -37,8 +37,8 @@ class NetworkDropdownButton : public views::MenuButton,
   // NetworkMenu implementation:
   virtual bool IsBrowserMode() const { return browser_mode_; }
   virtual gfx::NativeWindow GetNativeWindow() const { return parent_window_; }
-  virtual void OpenButtonOptions() const {}
-  virtual bool ShouldOpenButtonOptions() const {return false; }
+  virtual void OpenButtonOptions() {}
+  virtual bool ShouldOpenButtonOptions() const { return false; }
 
  private:
   bool browser_mode_;