Bug 1793736 - Include abort signal reason for fetch. r=necko-reviewers,valentin,tschuster

Differential Revision: https://phabricator.services.mozilla.com/D161669

dom/fetch/FetchService.cpp

@@ -208,7 +208,8 @@ void FetchService::FetchInstance::Cancel() {
 }
 
 void FetchService::FetchInstance::OnResponseEnd(
-    FetchDriverObserver::EndReason aReason) {
+    FetchDriverObserver::EndReason aReason,
+    JS::Handle<JS::Value> aReasonDetails) {
   FETCH_LOG(("FetchInstance::OnResponseEnd [%p]", this));
   if (aReason == eAborted) {
     FETCH_LOG(("FetchInstance::OnResponseEnd end with eAborted"));