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

chromeos/network/shill_property_handler.cc

Index: chromeos/network/shill_property_handler.cc
diff --git a/chromeos/network/shill_property_handler.cc b/chromeos/network/shill_property_handler.cc
index a3f77a5419ca9135e4984466726e42a4331ee64f..a1e643f4d0046a175ddb7179f2232e264f626e31 100644
--- a/chromeos/network/shill_property_handler.cc
+++ b/chromeos/network/shill_property_handler.cc
@@ -379,7 +379,7 @@ void ShillPropertyHandler::UpdateObserved(ManagedState::ManagedType type,
       (type == ManagedState::MANAGED_TYPE_NETWORK) ? observed_networks_
                                                    : observed_devices_;
   ShillPropertyObserverMap new_observed;
-  for (auto* entry : entries) {
+  for (const auto& entry : entries) {
     std::string path;
     entry->GetAsString(&path);
     if (path.empty())