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

components/user_prefs/tracked/dictionary_hash_store_contents.cc

 // Copyright (c) 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.
 
 #include "components/user_prefs/tracked/dictionary_hash_store_contents.h"
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/values.h"
@@ skipping 60 matching lines @@
 bool DictionaryHashStoreContents::IsInitialized() const {
   return storage_->GetDictionary(kPreferenceMACs, NULL);
 }
 
 const base::DictionaryValue* DictionaryHashStoreContents::GetContents() const {
   const base::DictionaryValue* mac_dictionary = NULL;
   storage_->GetDictionary(kPreferenceMACs, &mac_dictionary);
   return mac_dictionary;
 }
 
-scoped_ptr<HashStoreContents::MutableDictionary>
+std::unique_ptr<HashStoreContents::MutableDictionary>
 DictionaryHashStoreContents::GetMutableContents() {
-  return scoped_ptr<MutableDictionary>(
+  return std::unique_ptr<MutableDictionary>(
       new MutablePreferenceMacDictionary(storage_));
 }
 
 std::string DictionaryHashStoreContents::GetSuperMac() const {
   std::string super_mac_string;
   storage_->GetString(kSuperMACPref, &super_mac_string);
   return super_mac_string;
 }
 
 void DictionaryHashStoreContents::SetSuperMac(const std::string& super_mac) {
   storage_->SetString(kSuperMACPref, super_mac);
 }