Re-write many calls to WrapUnique() with MakeUnique()

chrome/browser/chromeos/policy/cloud_external_data_manager_base_test_util.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 "chrome/browser/chromeos/policy/cloud_external_data_manager_base_test_util.h"
 
 #include <utility>
 
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
@@ skipping 31 matching lines @@
 }
 
 void SetExternalDataReference(CloudPolicyCore* core,
                               const std::string& policy,
                               std::unique_ptr<base::DictionaryValue> metadata) {
   CloudPolicyStore* store = core->store();
   ASSERT_TRUE(store);
   PolicyMap policy_map;
   policy_map.Set(policy, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
                  POLICY_SOURCE_CLOUD, std::move(metadata),
-                 base::WrapUnique(new ExternalDataFetcher(
-                     store->external_data_manager(), policy)));
+                 base::MakeUnique<ExternalDataFetcher>(
+                     store->external_data_manager(), policy));
   store->SetPolicyMapForTesting(policy_map);
 }
 
 }  // namespace test
 }  // namespace policy