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

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_engine.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
index 50de05fc43eedb2d20ba5a0cbccb18ed56e5e5e9..f0f9acf98b9c780a4c4a494f5f02ecd781d9673b 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
@@ -201,7 +201,7 @@ std::unique_ptr<SyncEngine> SyncEngine::CreateForBrowserContext(
       ui_task_runner.get(), worker_task_runner.get(), drive_task_runner.get(),
       worker_pool.get(), GetSyncFileSystemDir(context->GetPath()), task_logger,
       notification_manager, extension_service, signin_manager, token_service,
-      request_context.get(), base::WrapUnique(new DriveServiceFactory()),
+      request_context.get(), base::MakeUnique<DriveServiceFactory>(),
       nullptr /* env_override */));
 
   sync_engine->Initialize();