Get rid of URLLoaderFactory in browser-side case

content/network/network_service_url_loader_factory_impl.cc

Index: content/network/network_service_url_loader_factory_impl.cc
diff --git a/content/network/network_service_url_loader_factory_impl.cc b/content/network/network_service_url_loader_factory_impl.cc
index 58fef657031a348d7124d22783118fd50f556223..096da24edb83768345ab430dc71f419babbf6e9d 100644
--- a/content/network/network_service_url_loader_factory_impl.cc
+++ b/content/network/network_service_url_loader_factory_impl.cc
@@ -27,8 +27,8 @@ void NetworkServiceURLLoaderFactoryImpl::CreateLoaderAndStart(
     uint32_t options,
     const ResourceRequest& url_request,
     mojom::URLLoaderClientPtr client) {
-  new URLLoaderImpl(context_, std::move(request), options, url_request,
-                    std::move(client));
+  URLLoaderImpl* loader = new URLLoaderImpl(context_, options, url_request);
+  loader->Start(std::move(request), std::move(client));
 }
 
 void NetworkServiceURLLoaderFactoryImpl::SyncLoad(