Add a mojo bridge for PersistentPrefStore.

chrome/browser/prefs/chrome_pref_service_factory.h

 // Copyright (c) 2012 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_CHROME_PREF_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_PREFS_CHROME_PREF_SERVICE_FACTORY_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
@@ skipping 60 matching lines @@
 std::unique_ptr<PrefService> CreateLocalState(
     const base::FilePath& pref_filename,
     base::SequencedTaskRunner* pref_io_task_runner,
     policy::PolicyService* policy_service,
     const scoped_refptr<PrefRegistry>& pref_registry,
     bool async);
 
 std::unique_ptr<sync_preferences::PrefServiceSyncable> CreateProfilePrefs(
     const base::FilePath& pref_filename,
     base::SequencedTaskRunner* pref_io_task_runner,
-    prefs::mojom::TrackedPreferenceValidationDelegate* validation_delegate,
+    std::unique_ptr<prefs::mojom::TrackedPreferenceValidationDelegate>*
+        validation_delegate,
     policy::PolicyService* policy_service,
     SupervisedUserSettingsService* supervised_user_settings,
     const scoped_refptr<PrefStore>& extension_prefs,
     const scoped_refptr<user_prefs::PrefRegistrySyncable>& pref_registry,
     bool async);
 
 // Call before startup tasks kick in to ignore the presence of a domain when
 // determining the active SettingsEnforcement group. For testing only.
 void DisableDomainCheckForTesting();
 
@@ skipping 10 matching lines @@
 // Clears the time of the last preference reset event, if any, for the provided
 // profile.
 void ClearResetTime(Profile* profile);
 
 // Register user prefs used by chrome preference system.
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
 }  // namespace chrome_prefs
 
 #endif  // CHROME_BROWSER_PREFS_CHROME_PREF_SERVICE_FACTORY_H_