Further polish to extensions_ui page

chrome/browser/browser_prefs.cc

Index: chrome/browser/browser_prefs.cc
diff --git a/chrome/browser/browser_prefs.cc b/chrome/browser/browser_prefs.cc
index cf1372912dd5df3daeaa75bd777dc345995c18e6..8020c4fa2951307b544777d7f9bf013c4aa4c783 100644
--- a/chrome/browser/browser_prefs.cc
+++ b/chrome/browser/browser_prefs.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/dom_ui/new_tab_ui.h"
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/browser/extensions/extension_dom_ui.h"
+#include "chrome/browser/extensions/extensions_ui.h"
 #include "chrome/browser/external_protocol_handler.h"
 #include "chrome/browser/form_field_history_manager.h"
 #include "chrome/browser/google_url_tracker.h"
@@ -79,6 +80,7 @@ void RegisterAllPrefs(PrefService* user_prefs, PrefService* local_state) {
   TabContents::RegisterUserPrefs(user_prefs);
   TemplateURLPrepopulateData::RegisterUserPrefs(user_prefs);
   ExtensionDOMUI::RegisterUserPrefs(user_prefs);
+  ExtensionsUI::RegisterUserPrefs(user_prefs);
   NewTabUI::RegisterUserPrefs(user_prefs);
   BlockedPopupContainer::RegisterUserPrefs(user_prefs);
   DevToolsManager::RegisterUserPrefs(user_prefs);