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

chrome/browser/sync_file_system/drive_backend/register_app_task_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 "chrome/browser/sync_file_system/drive_backend/register_app_task.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 69 matching lines @@
 
  protected:
   std::unique_ptr<LevelDBWrapper> OpenLevelDB() {
     leveldb::DB* db = nullptr;
     leveldb::Options options;
     options.create_if_missing = true;
     options.env = in_memory_env_.get();
     leveldb::Status status =
         leveldb::DB::Open(options, database_dir_.path().AsUTF8Unsafe(), &db);
     EXPECT_TRUE(status.ok());
-    return base::WrapUnique(new LevelDBWrapper(base::WrapUnique(db)));
+    return base::MakeUnique<LevelDBWrapper>(base::WrapUnique(db));
   }
 
   void SetUpInitialData(LevelDBWrapper* db) {
     ServiceMetadata service_metadata;
     service_metadata.set_largest_change_id(100);
     service_metadata.set_sync_root_tracker_id(kSyncRootTrackerID);
     service_metadata.set_next_tracker_id(next_tracker_id_);
 
     FileDetails sync_root_details;
     sync_root_details.set_title(kSyncRootFolderTitle);
@@ skipping 234 matching lines @@
 
   CreateMetadataDatabase(std::move(db));
   RunRegisterAppTask(kAppID);
 
   EXPECT_EQ(1u, CountRegisteredAppRoot());
   EXPECT_TRUE(IsAppRegistered(kAppID));
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system