Use std::unique_ptr to express ownership of base::Value in PolicyMap::Entry

chrome/browser/chromeos/policy/user_cloud_external_data_manager_browsertest.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 <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
@@ skipping 66 matching lines @@
                                  base::WrapUnique(metadata->DeepCopy()));
   content::RunAllPendingInMessageLoop();
 
   ProfilePolicyConnector* policy_connector =
       ProfilePolicyConnectorFactory::GetForBrowserContext(browser()->profile());
   ASSERT_TRUE(policy_connector);
   const PolicyMap& policies = policy_connector->policy_service()->GetPolicies(
       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()));
   const PolicyMap::Entry* policy_entry = policies.Get(key::kHomepageLocation);
   ASSERT_TRUE(policy_entry);
-  EXPECT_TRUE(base::Value::Equals(metadata.get(), policy_entry->value));
+  EXPECT_TRUE(base::Value::Equals(metadata.get(), policy_entry->value.get()));
   ASSERT_TRUE(policy_entry->external_data_fetcher);
 
   base::RunLoop run_loop;
   std::unique_ptr<std::string> fetched_external_data;
   policy_entry->external_data_fetcher->Fetch(base::Bind(
       &test::ExternalDataFetchCallback,
       &fetched_external_data,
       run_loop.QuitClosure()));
   run_loop.Run();
 
   ASSERT_TRUE(fetched_external_data);
   EXPECT_EQ(external_data, *fetched_external_data);
 }
 
 }  // namespace policy