Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/ui/webui/ntp/new_tab_ui.h

Index: chrome/browser/ui/webui/ntp/new_tab_ui.h
diff --git a/chrome/browser/ui/webui/ntp/new_tab_ui.h b/chrome/browser/ui/webui/ntp/new_tab_ui.h
index d13091df4c44944c1d72cf4355ce7e978164aa96..58fbb771b7d8f3bd4f0c34b38e1d787ca2af872b 100644
--- a/chrome/browser/ui/webui/ntp/new_tab_ui.h
+++ b/chrome/browser/ui/webui/ntp/new_tab_ui.h
@@ -19,7 +19,7 @@
 #include "content/public/browser/web_ui_controller.h"
 
 class GURL;
-class PrefService;
+class PrefServiceSyncable;
 class Profile;
 
 // The WebContents used for the New Tab page.
@@ -29,7 +29,7 @@ class NewTabUI : public content::WebUIController,
   explicit NewTabUI(content::WebUI* web_ui);
   virtual ~NewTabUI();
 
-  static void RegisterUserPrefs(PrefService* prefs);
+  static void RegisterUserPrefs(PrefServiceSyncable* prefs);
 
   // Returns whether or not to show apps pages.
   static bool ShouldShowApps();