Simplify adding callbacks.

chrome/browser/ui/webui/chromeos/login/network_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_NETWORK_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_
 
+#include <string>
+
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/login/screens/network_screen_actor.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 #include "ui/gfx/point.h"
 
-namespace base {
-class ListValue;
-}
-
 namespace chromeos {
 
 // WebUI implementation of NetworkScreenActor. It is used to interact with
 // the welcome screen (part of the page) of the OOBE.
 class NetworkScreenHandler : public NetworkScreenActor,
                              public BaseScreenHandler {
  public:
   NetworkScreenHandler();
   virtual ~NetworkScreenHandler();
 
@@ skipping 11 matching lines @@
   // BaseScreenHandler implementation:
   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) OVERRIDE;
   virtual void GetAdditionalParameters(base::DictionaryValue* dict) OVERRIDE;
   virtual void Initialize() OVERRIDE;
 
   // WebUIMessageHandler implementation:
   virtual void RegisterMessages() OVERRIDE;
 
  private:
   // Handles moving off the screen.
-  void HandleOnExit(const base::ListValue* args);
+  void HandleOnExit();
 
   // Handles change of the language.
-  void HandleOnLanguageChanged(const base::ListValue* args);
+  void HandleOnLanguageChanged(const std::string& locale);
 
   // Handles change of the input method.
-  void HandleOnInputMethodChanged(const base::ListValue* args);
+  void HandleOnInputMethodChanged(const std::string& id);
 
   // Returns available languages. Caller gets the ownership. Note, it does
   // depend on the current locale.
   static base::ListValue* GetLanguageList();
 
   // Returns available input methods. Caller gets the ownership. Note, it does
   // depend on the current locale.
   static base::ListValue* GetInputMethods();
 
   NetworkScreenActor::Delegate* screen_;
 
   bool is_continue_enabled_;
 
   // Keeps whether screen should be shown right after initialization.
   bool show_on_init_;
 
   // Position of the network control.
   gfx::Point network_control_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_SCREEN_HANDLER_H_