Simplify adding callbacks.

chrome/browser/ui/webui/chromeos/login/error_screen_handler.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ERROR_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ERROR_SCREEN_HANDLER_H_
 
 #include "base/cancelable_callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 32 matching lines @@
   virtual void AllowGuestSignin(bool allowed) OVERRIDE;
   virtual void AllowOfflineLogin(bool allowed) OVERRIDE;
 
  private:
   // Sends notification that error message is shown.
   void NetworkErrorShown();
 
   bool GetScreenName(OobeUI::Screen screen, std::string* name) const;
 
   // WebUI message handlers.
-  void HandleShowCaptivePortal(const base::ListValue* args);
-  void HandleHideCaptivePortal(const base::ListValue* args);
+  void HandleShowCaptivePortal();
+  void HandleHideCaptivePortal();
 
   // WebUIMessageHandler implementation:
   virtual void RegisterMessages() OVERRIDE;
 
   // BaseScreenHandler implementation:
   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) OVERRIDE;
   virtual void Initialize() OVERRIDE;
 
   // Proxy which manages showing of the window for captive portal entering.
   scoped_ptr<CaptivePortalWindowProxy> captive_portal_window_proxy_;
 
   // Network state informer used to keep error screen up.
   scoped_refptr<NetworkStateInformer> network_state_informer_;
 
   // NativeWindowDelegate used to get reference to NativeWindow.
   NativeWindowDelegate* native_window_delegate_;
 
   // Keeps whether screen should be shown right after initialization.
   bool show_on_init_;
 
   DISALLOW_COPY_AND_ASSIGN(ErrorScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ERROR_SCREEN_HANDLER_H_