[web-ui] Migrate RegisterMessageCallback usage to base::bind().

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

 // Copyright (c) 2011 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/update_screen_handler.h"
 
+#include "base/bind.h"
+#include "base/bind_helpers.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 
 // Update screen ID.
 const char kUpdateScreen[] = "update";
@@ skipping 81 matching lines @@
     info_message.reset(Value::CreateStringValue(
         l10n_util::GetStringFUTF16(IDS_INSTALLING_UPDATE,
           l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME))));
   }
   web_ui_->CallJavascriptFunction("cr.ui.Oobe.setUpdateMessage",
                                   *info_message);
 }
 
 void UpdateScreenHandler::RegisterMessages() {
 #if !defined(OFFICIAL_BUILD)
-  web_ui_->RegisterMessageCallback(
-      "cancelUpdate",
-      NewCallback(this, &UpdateScreenHandler::HandleUpdateCancel));
+  web_ui_->RegisterMessageCallback("cancelUpdate",
+      base::Bind(&UpdateScreenHandler::HandleUpdateCancel,
+                 base::Unretained(this)));
 #endif
 }
 
 #if !defined(OFFICIAL_BUILD)
 void UpdateScreenHandler::HandleUpdateCancel(const base::ListValue* args) {
   DCHECK(args && args->empty());
   screen_->CancelUpdate();
 }
 #endif
 
 }  // namespace chromeos