Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/ui/webui/plugins_ui.h

Index: chrome/browser/ui/webui/plugins_ui.h
diff --git a/chrome/browser/ui/webui/plugins_ui.h b/chrome/browser/ui/webui/plugins_ui.h
index a4b5dd7ef6155f57fc4a23a22a69409e1da10833..8ad24a4f35b6b41ba54b213f475833436a6ac706 100644
--- a/chrome/browser/ui/webui/plugins_ui.h
+++ b/chrome/browser/ui/webui/plugins_ui.h
@@ -8,7 +8,7 @@
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/base/layout.h"
 
-class PrefService;
+class PrefServiceSyncable;
 
 namespace base {
 class RefCountedMemory;
@@ -20,7 +20,7 @@ class PluginsUI : public content::WebUIController {
 
   static base::RefCountedMemory* GetFaviconResourceBytes(
       ui::ScaleFactor scale_factor);
-  static void RegisterUserPrefs(PrefService* prefs);
+  static void RegisterUserPrefs(PrefServiceSyncable* prefs);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PluginsUI);