Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/chromeos/login/wizard_controller.h

Index: chrome/browser/chromeos/login/wizard_controller.h
diff --git a/chrome/browser/chromeos/login/wizard_controller.h b/chrome/browser/chromeos/login/wizard_controller.h
index 822e2e6a128af7c6839c084d64610be16b67cc11..315477650a49137d0b8de3e096cf6873562d7379 100644
--- a/chrome/browser/chromeos/login/wizard_controller.h
+++ b/chrome/browser/chromeos/login/wizard_controller.h
@@ -18,7 +18,7 @@
 #include "googleurl/src/gurl.h"
 #include "ui/gfx/rect.h"
 
-class PrefService;
+class PrefServiceSimple;
 
 namespace base {
 class DictionaryValue;
@@ -99,7 +99,7 @@ class WizardController : public ScreenObserver {
   static void SetInitialLocale(const std::string& locale);
 
   // Registers OOBE preferences.
-  static void RegisterPrefs(PrefService* local_state);
+  static void RegisterPrefs(PrefServiceSimple* local_state);
 
   // Marks user image screen to be always skipped after login.
   static void SkipImageSelectionForTesting();