Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/chromeos/login/user_image_manager.h

Index: chrome/browser/chromeos/login/user_image_manager.h
diff --git a/chrome/browser/chromeos/login/user_image_manager.h b/chrome/browser/chromeos/login/user_image_manager.h
index 1e88edf44987ace39831e250e07e6a01d15a885c..83868620741a747b07de9c5622a0e68ae00ba7e2 100644
--- a/chrome/browser/chromeos/login/user_image_manager.h
+++ b/chrome/browser/chromeos/login/user_image_manager.h
@@ -10,7 +10,7 @@
 #include "chrome/browser/chromeos/login/user.h"
 
 class FilePath;
-class PrefServiceSimple;
+class PrefRegistrarSimple;
 
 namespace gfx {
 class ImageSkia;
@@ -24,7 +24,7 @@ class UserImage;
 class UserImageManager {
  public:
   // Registers user image manager preferences.
-  static void RegisterPrefs(PrefServiceSimple* local_state);
+  static void RegisterPrefs(PrefRegistrarSimple* local_state);
 
   virtual ~UserImageManager();