Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/ui/browser_ui_prefs.h

Index: chrome/browser/ui/browser_ui_prefs.h
diff --git a/chrome/browser/ui/browser_ui_prefs.h b/chrome/browser/ui/browser_ui_prefs.h
index 6cef1262fde9e79871dc4f80c5a40c371e659cf8..66d8e0d0d041b81a9fb46c81cfc05fe8c1683586 100644
--- a/chrome/browser/ui/browser_ui_prefs.h
+++ b/chrome/browser/ui/browser_ui_prefs.h
@@ -7,13 +7,13 @@
 
 #include <string>
 
-class PrefServiceSimple;
+class PrefRegistrarSimple;
 class PrefServiceSyncable;
 class Profile;
 
 namespace chrome {
 
-void RegisterBrowserPrefs(PrefServiceSimple* prefs);
+void RegisterBrowserPrefs(PrefRegistrarSimple* prefs);
 void RegisterBrowserUserPrefs(PrefServiceSyncable* prefs);
 
 // Create a preference dictionary for the provided application name, in the