Use unique_ptr<DictionaryValue> in ProxyConfigDictionary

chromeos/network/onc/onc_utils_unittest.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 "chromeos/network/onc/onc_utils.h"
 
 #include <string>
 
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_reader.h"
@@ skipping 207 matching lines @@
     base::DictionaryValue* test_case;
     (*it)->GetAsDictionary(&test_case);
 
     base::DictionaryValue* shill_proxy_config;
     test_case->GetDictionary("ProxyConfig", &shill_proxy_config);
 
     base::DictionaryValue* onc_proxy_settings;
     test_case->GetDictionary("ONC_ProxySettings", &onc_proxy_settings);
 
     std::unique_ptr<base::DictionaryValue> actual_proxy_settings =
-        ConvertProxyConfigToOncProxySettings(*shill_proxy_config);
+        ConvertProxyConfigToOncProxySettings(
+            shill_proxy_config->CreateDeepCopy());
     EXPECT_TRUE(
         test_utils::Equals(onc_proxy_settings, actual_proxy_settings.get()));
   }
 }
 
 }  // namespace onc
 }  // namespace chromeos