Simplify adding callbacks.

chrome/browser/ui/webui/chromeos/login/wrong_hwid_screen_handler.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/ui/webui/chromeos/login/wrong_hwid_screen_handler.h"
 
-#include "base/values.h"
 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 
 namespace chromeos {
 
 WrongHWIDScreenHandler::WrongHWIDScreenHandler()
     : delegate_(NULL), show_on_init_(false) {
 }
 
@@ skipping 40 matching lines @@
   if (show_on_init_) {
     Show();
     show_on_init_ = false;
   }
 }
 
 void WrongHWIDScreenHandler::RegisterMessages() {
   AddCallback("wrongHWIDOnSkip", &WrongHWIDScreenHandler::HandleOnSkip);
 }
 
-void WrongHWIDScreenHandler::HandleOnSkip(const base::ListValue* args) {
+void WrongHWIDScreenHandler::HandleOnSkip() {
   if (delegate_)
     delegate_->OnExit();
 }
 
 }  // namespace chromeos