Change more base::ListValue methods to use std::unique_ptr.

components/syncable_prefs/pref_model_associator.cc

 // 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.
 
 #include "components/syncable_prefs/pref_model_associator.h"
 
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/json/json_reader.h"
@@ skipping 281 matching lines @@
     return from_value.DeepCopy();
 
   DCHECK(from_value.GetType() == base::Value::TYPE_LIST);
   DCHECK(to_value.GetType() == base::Value::TYPE_LIST);
   const base::ListValue& from_list_value =
       static_cast<const base::ListValue&>(from_value);
   const base::ListValue& to_list_value =
       static_cast<const base::ListValue&>(to_value);
   base::ListValue* result = to_list_value.DeepCopy();
 
-  for (base::ListValue::const_iterator i = from_list_value.begin();
-       i != from_list_value.end(); ++i) {
-    base::Value* value = (*i)->DeepCopy();
-    result->AppendIfNotPresent(value);
+  for (const auto& value : from_list_value) {
+    result->AppendIfNotPresent(value->CreateDeepCopy());
   }
   return result;
 }
 
 base::Value* PrefModelAssociator::MergeDictionaryValues(
     const base::Value& from_value,
     const base::Value& to_value) {
   if (from_value.GetType() == base::Value::TYPE_NULL)
     return to_value.DeepCopy();
   if (to_value.GetType() == base::Value::TYPE_NULL)
@@ skipping 227 matching lines @@
   SyncedPrefObserverMap::const_iterator observer_iter =
       synced_pref_observers_.find(path);
   if (observer_iter == synced_pref_observers_.end())
     return;
   SyncedPrefObserverList* observers = observer_iter->second;
   FOR_EACH_OBSERVER(SyncedPrefObserver, *observers,
                     OnSyncedPrefChanged(path, from_sync));
 }
 
 }  // namespace syncable_prefs