Make the request initiator Optional

content/public/test/test_download_request_handler.cc

Index: content/public/test/test_download_request_handler.cc
diff --git a/content/public/test/test_download_request_handler.cc b/content/public/test/test_download_request_handler.cc
index 48b74508d176bca8ca1f556466db1e818fab487e..c0f9525704855764b509283be42160281791ce74 100644
--- a/content/public/test/test_download_request_handler.cc
+++ b/content/public/test/test_download_request_handler.cc
@@ -327,7 +327,9 @@ void TestDownloadRequestHandler::PartialResponseJob::ReportCompletedRequest() {
     completed_request->request_headers = request()->extra_request_headers();
     completed_request->referrer = request()->referrer();
     completed_request->referrer_policy = request()->referrer_policy();
-    completed_request->initiator = request()->initiator();
+    completed_request->initiator = request()->initiator().has_value()
+                                       ? request()->initiator().value()
+                                       : url::Origin();
     completed_request->first_party_for_cookies =
         request()->first_party_for_cookies();
     completed_request->first_party_url_policy =