Integrate registry_hash_store_contents with the rest of tracked prefs.

components/user_prefs/tracked/tracked_preference.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_USER_PREFS_TRACKED_TRACKED_PREFERENCE_H_
 #define COMPONENTS_USER_PREFS_TRACKED_TRACKED_PREFERENCE_H_
 
 class PrefHashStoreTransaction;
 
 namespace base {
@@ skipping 12 matching lines @@
   virtual void OnNewValue(const base::Value* value,
                           PrefHashStoreTransaction* transaction) const = 0;
 
   // Verifies that the value of this TrackedPreference in |pref_store_contents|
   // is valid. Responds to verification failures according to
   // preference-specific and browser-wide policy and reports results to via UMA.
   // May use |transaction| to check/modify hashes in the corresponding hash
   // store.
   virtual bool EnforceAndReport(
       base::DictionaryValue* pref_store_contents,
-      PrefHashStoreTransaction* transaction) const = 0;
+      PrefHashStoreTransaction* transaction,
+      PrefHashStoreTransaction* registry_transaction) const = 0;
 };
 
 #endif  // COMPONENTS_USER_PREFS_TRACKED_TRACKED_PREFERENCE_H_