Update incognito and guest browsing new tab page:

chrome/browser/ui/webui/ntp/ntp_resource_cache.cc

 // 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.
 
 #include "chrome/browser/ui/webui/ntp/ntp_resource_cache.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 309 matching lines @@
           GetUrlWithLang(GURL(chrome::kLearnMoreEnterpriseURL)));
     } else {
       localized_strings.SetString("enterpriseInfoVisible", "false");
     }
   }
 #endif
 
   localized_strings.SetString("content",
       l10n_util::GetStringFUTF16(new_tab_message_ids,
                                  GetUrlWithLang(GURL(new_tab_link))));
-  localized_strings.SetString("extensionsmessage",
-      l10n_util::GetStringFUTF16(
-          IDS_NEW_TAB_OTR_EXTENSIONS_MESSAGE,
-          base::ASCIIToUTF16(chrome::kChromeUIExtensionsURL)));
   bool bookmark_bar_attached = profile_->GetPrefs()->GetBoolean(
       prefs::kShowBookmarkBar);
   localized_strings.SetBoolean("bookmarkbarattached", bookmark_bar_attached);
 
   webui::SetFontAndTextDirection(&localized_strings);
 
   static const base::StringPiece incognito_tab_html(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           new_tab_html_idr));
 
@@ skipping 363 matching lines @@
   // Get our template.
   static const base::StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           IDR_NEW_TAB_4_THEME_CSS));
 
   // Create the string from our template and the replacements.
   std::string css_string;
   css_string = ReplaceStringPlaceholders(new_tab_theme_css, subst, NULL);
   new_tab_css_ = base::RefCountedString::TakeString(&css_string);
 }