Revert of Use associated interface on DownloadedTempFile

content/common/url_loader.mojom

Index: content/common/url_loader.mojom
diff --git a/content/common/url_loader.mojom b/content/common/url_loader.mojom
index 5429331b06064cda930e9b515472a357b57b85fa..e7da7ea76d881a85633650ee18ec97db5c67656c 100644
--- a/content/common/url_loader.mojom
+++ b/content/common/url_loader.mojom
@@ -35,8 +35,7 @@ interface DownloadedTempFile {
 interface URLLoaderClient {
   // Called when the response head is received. |downloaded_file| is non-null in
   // the 'download_to_file' case.
-  OnReceiveResponse(URLResponseHead head,
-                    associated DownloadedTempFile? downloaded_file);
+  OnReceiveResponse(URLResponseHead head, DownloadedTempFile? downloaded_file);
 
   // Called when the request has been redirected. The receiver is expected to
   // call FollowRedirect or cancel the request.