Convert //components/user_prefs from scoped_ptr to std::unique_ptr

components/user_prefs/tracked/pref_service_hash_store_contents.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_PREF_SERVICE_HASH_STORE_CONTENTS_H_
 #define COMPONENTS_USER_PREFS_TRACKED_PREF_SERVICE_HASH_STORE_CONTENTS_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 40 matching lines @@
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   // Deletes stored hashes for all profiles from |pref_service|.
   static void ResetAllPrefHashStores(PrefService* pref_service);
 
   // HashStoreContents implementation
   std::string hash_store_id() const override;
   void Reset() override;
   bool IsInitialized() const override;
   const base::DictionaryValue* GetContents() const override;
-  scoped_ptr<MutableDictionary> GetMutableContents() override;
+  std::unique_ptr<MutableDictionary> GetMutableContents() override;
   std::string GetSuperMac() const override;
   void SetSuperMac(const std::string& super_mac) override;
 
  private:
   const std::string hash_store_id_;
   PrefService* pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefServiceHashStoreContents);
 };
 
 #endif  // COMPONENTS_PREFS_TRACKED_PREF_SERVICE_HASH_STORE_CONTENTS_H_