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

chrome/browser/extensions/api/enterprise_device_attributes/enterprise_device_attributes_apitest.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 "base/strings/stringprintf.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/policy/affiliation_test_helper.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_policy_cros_browser_test.h"
 #include "chrome/browser/chromeos/policy/stub_enterprise_install_attributes.h"
@@ skipping 129 matching lines @@
     GURL update_manifest_url(net::URLRequestMockHTTPJob::GetMockUrl(
         update_manifest_path.MaybeAsASCII()));
 
     std::unique_ptr<base::ListValue> forcelist(new base::ListValue);
     forcelist->AppendString(base::StringPrintf(
         "%s;%s", kTestExtensionID, update_manifest_url.spec().c_str()));
 
     policy::PolicyMap policy;
     policy.Set(policy::key::kExtensionInstallForcelist,
                policy::POLICY_LEVEL_MANDATORY, policy::POLICY_SCOPE_MACHINE,
-               policy::POLICY_SOURCE_CLOUD, forcelist.release(), nullptr);
+               policy::POLICY_SOURCE_CLOUD, std::move(forcelist), nullptr);
 
     // Set the policy and wait until the extension is installed.
     extensions::TestExtensionRegistryObserver observer(
         ExtensionRegistry::Get(profile()));
     policy_provider_.UpdateChromePolicy(policy);
     observer.WaitForExtensionLoaded();
   }
 
   // Load |page_url| in |browser| and wait for PASSED or FAILED notification.
   // The functionality of this function is reduced functionality of
@@ skipping 73 matching lines @@
       "'enterprise.deviceAttributes' is not allowed for specified install "
       "location.",
       extension->install_warnings()[0].message);
 }
 
 // Both cases of affiliated and non-affiliated on the device user are tested.
 INSTANTIATE_TEST_CASE_P(AffiliationCheck,
                           EnterpriseDeviceAttributesTest,
                         ::testing::Values(Params(true), Params(false)));
 }  //  namespace extensions