Make the download's response headers available in the DownloadItem

content/browser/download/download_request_core.cc

Index: content/browser/download/download_request_core.cc
diff --git a/content/browser/download/download_request_core.cc b/content/browser/download/download_request_core.cc
index 6469a5c20eb7832dd4462e4d57bfe1809616ca12..bffd3386d84fb18a85eae407662272b1eaff14c2 100644
--- a/content/browser/download/download_request_core.cc
+++ b/content/browser/download/download_request_core.cc
@@ -234,6 +234,7 @@ DownloadRequestCore::CreateDownloadCreateInfo(DownloadInterruptReason result) {
   create_info->result = result;
   create_info->download_id = download_id_;
   create_info->transient = transient_;
+  create_info->response_code = request()->response_headers()->response_code();
   create_info->offset = create_info->save_info->offset;
   return create_info;
 }