Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

components/arc/net/arc_net_host_impl.cc

 // Copyright 2015 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/arc/net/arc_net_host_impl.h"
 
 #include <memory>
 #include <string>
 #include <vector>
 
@@ skipping 351 matching lines @@
       chromeos::network_util::TranslateNetworkListToONC(
           network_pattern, configured_only, visible_only,
           kGetNetworksListLimit);
 
   // Extract info for each network and add it to the list.
   // Even if there's no WiFi, an empty (size=0) list must be returned and not a
   // null one. The explicitly sized New() constructor ensures the non-null
   // property.
   mojo::Array<mojom::WifiConfigurationPtr> networks =
       mojo::Array<mojom::WifiConfigurationPtr>::New(0);
-  for (base::Value* value : *network_properties_list) {
+  for (const auto& value : *network_properties_list) {
     mojom::WifiConfigurationPtr wc = mojom::WifiConfiguration::New();
 
     base::DictionaryValue* network_dict = nullptr;
     value->GetAsDictionary(&network_dict);
     DCHECK(network_dict);
 
     // kName is a post-processed version of kHexSSID.
     std::string tmp;
     network_dict->GetString(onc::network_config::kName, &tmp);
     DCHECK(!tmp.empty());
@@ skipping 227 matching lines @@
       base::Bind(&arc::ArcNetHostImpl::DefaultNetworkSuccessCallback,
                  weak_factory_.GetWeakPtr()),
       base::Bind(&DefaultNetworkFailureCallback));
 }
 
 void ArcNetHostImpl::OnShuttingDown() {
   GetStateHandler()->RemoveObserver(this, FROM_HERE);
 }
 
 }  // namespace arc