Clean up old legacy preference migration logic.

chrome/browser/prefs/profile_pref_store_manager.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 CHROME_BROWSER_PREFS_PROFILE_PREF_STORE_MANAGER_H_
 #define CHROME_BROWSER_PREFS_PROFILE_PREF_STORE_MANAGER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 38 matching lines @@
           tracking_configuration,
       size_t reporting_ids_count,
       const std::string& seed,
       const std::string& device_id,
       PrefService* local_state);
 
   ~ProfilePrefStoreManager();
 
   static const bool kPlatformSupportsPreferenceTracking;
 
-  // Register local state prefs used by the profile preferences system.
-  static void RegisterPrefs(PrefRegistrySimple* registry);
-
   // Register user prefs used by the profile preferences system.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
-  // Deletes stored hashes for all profiles from |local_state|.
-  static void ResetAllPrefHashStores(PrefService* local_state);
-
   // Retrieves the time of the last preference reset event, if any, for
   // |pref_service|. Assumes that |pref_service| is backed by a PrefStore that
   // was built by ProfilePrefStoreManager.
   // If no reset has occurred, returns a null |Time|.
   static base::Time GetResetTime(PrefService* pref_service);
 
   // Clears the time of the last preference reset event, if any, for
   // |pref_service|. Assumes that |pref_service| is backed by a PrefStore that
   // was built by ProfilePrefStoreManager.
   static void ClearResetTime(PrefService* pref_service);
@@ skipping 32 matching lines @@
       tracking_configuration_;
   const size_t reporting_ids_count_;
   const std::string seed_;
   const std::string device_id_;
   PrefService* local_state_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfilePrefStoreManager);
 };
 
 #endif  // CHROME_BROWSER_PREFS_PROFILE_PREF_STORE_MANAGER_H_