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

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

Index: chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
===================================================================
--- chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc	(revision 103795)
+++ chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc	(working copy)
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/ui/webui/chromeos/login/core_oobe_handler.h"
 
+#include "base/bind.h"
+#include "base/bind_helpers.h"
 #include "base/values.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/accessibility_util.h"
@@ -52,9 +54,11 @@
 
 void CoreOobeHandler::RegisterMessages() {
   web_ui_->RegisterMessageCallback(kJsApiToggleAccessibility,
-      NewCallback(this, &CoreOobeHandler::OnToggleAccessibility));
+      base::Bind(&CoreOobeHandler::OnToggleAccessibility,
+                 base::Unretained(this)));
   web_ui_->RegisterMessageCallback(kJsApiScreenStateInitialize,
-      NewCallback(this, &CoreOobeHandler::OnInitialized));
+      base::Bind(&CoreOobeHandler::OnInitialized,
+                 base::Unretained(this)));
 }
 
 void CoreOobeHandler::OnInitialized(const base::ListValue* args) {