Use unique_ptr<DictionaryValue> in ProxyConfigDictionary

components/policy/core/browser/proxy_policy_handler_unittest.cc

 // Copyright 2013 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/policy/core/browser/proxy_policy_handler.h"
 
 #include <memory>
 #include <string>
 
 #include "base/memory/ptr_util.h"
@@ skipping 30 matching lines @@
   // Verify that all the proxy prefs are set to the specified expected values.
   void VerifyProxyPrefs(
       const std::string& expected_proxy_server,
       const std::string& expected_proxy_pac_url,
       const std::string& expected_proxy_bypass_list,
       const ProxyPrefs::ProxyMode& expected_proxy_mode) {
     const base::Value* value = NULL;
     ASSERT_TRUE(store_->GetValue(proxy_config::prefs::kProxy, &value));
     ASSERT_EQ(base::Value::Type::DICTIONARY, value->GetType());
     ProxyConfigDictionary dict(
-        static_cast<const base::DictionaryValue*>(value));
+        static_cast<const base::DictionaryValue*>(value)->CreateDeepCopy());
     std::string s;
     if (expected_proxy_server.empty()) {
       EXPECT_FALSE(dict.GetProxyServer(&s));
     } else {
       ASSERT_TRUE(dict.GetProxyServer(&s));
       EXPECT_EQ(expected_proxy_server, s);
     }
     if (expected_proxy_pac_url.empty()) {
       EXPECT_FALSE(dict.GetPacUrl(&s));
     } else {
@@ skipping 234 matching lines @@
   for (int i = 0; i < ProxyPolicyHandler::MODE_COUNT; ++i) {
     policy.Set(key::kProxyServerMode, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
                POLICY_SOURCE_CLOUD, base::MakeUnique<base::Value>(i), nullptr);
     UpdateProviderPolicy(policy);
     const base::Value* value = nullptr;
     EXPECT_FALSE(store_->GetValue(proxy_config::prefs::kProxy, &value));
   }
 }
 
 }  // namespace policy