Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/web_resource/plugins_resource_service.h

Index: chrome/browser/web_resource/plugins_resource_service.h
diff --git a/chrome/browser/web_resource/plugins_resource_service.h b/chrome/browser/web_resource/plugins_resource_service.h
index d01597e7b270ec40ab44c9b9da15f1761ddce7af..9a3b0d385b61619af0c24c028840e51d50fa85e0 100644
--- a/chrome/browser/web_resource/plugins_resource_service.h
+++ b/chrome/browser/web_resource/plugins_resource_service.h
@@ -8,7 +8,7 @@
 #include "chrome/browser/web_resource/web_resource_service.h"
 
 class PrefService;
-class PrefServiceSimple;
+class PrefRegistrySimple;
 
 // This resource service periodically fetches plug-in metadata
 // from a remote server and updates local state and PluginFinder.
@@ -16,7 +16,7 @@ class PluginsResourceService : public WebResourceService {
  public:
   explicit PluginsResourceService(PrefService* local_state);
 
-  static void RegisterPrefs(PrefServiceSimple* local_state);
+  static void RegisterPrefs(PrefRegistrySimple* registry);
 
  private:
   virtual ~PluginsResourceService();