Fix and refactor downloaded file handling in the loading stack

content/renderer/service_worker/service_worker_context_client.cc

Index: content/renderer/service_worker/service_worker_context_client.cc
diff --git a/content/renderer/service_worker/service_worker_context_client.cc b/content/renderer/service_worker/service_worker_context_client.cc
index 92d5424c7d61b2d8e651e358fd278b0a589e9cf8..9a3bc3a18cb2b654b2a6faaec8eb7ea3508f13d4 100644
--- a/content/renderer/service_worker/service_worker_context_client.cc
+++ b/content/renderer/service_worker/service_worker_context_client.cc
@@ -262,8 +262,11 @@ class ServiceWorkerContextClient::NavigationPreloadRequest final
                 "respondWith or waitUntil.")));
   }
 
-  void OnReceiveResponse(const ResourceResponseHead& response_head) override {
+  void OnReceiveResponse(
+      const ResourceResponseHead& response_head,
+      mojom::DownloadedTempFilePtr downloaded_file) override {
     DCHECK(!response_);
+    DCHECK(!downloaded_file);
     response_ = base::MakeUnique<blink::WebServiceWorkerResponse>();
     response_->setURL(url_);
     DCHECK(response_head.headers);