Bug 1917479 - FS: Add mapping for NS_ABORT_ERROR; r=dom-storage-reviewers,jari

Differential Revision: https://phabricator.services.mozilla.com/D219862

dom/fs/child/FileSystemRequestHandler.cpp

@@ -304,6 +304,11 @@ struct BeginRequestFailureCallback {
       : mPromise(std::move(aPromise)) {}
 
   void operator()(nsresult aRv) const {
+    if (aRv == NS_ERROR_ABORT) {
+      mPromise->MaybeRejectWithAbortError(
+          "Abort error when calling GetDirectory");
+      return;
+    }
     if (aRv == NS_ERROR_DOM_SECURITY_ERR) {
       mPromise->MaybeRejectWithSecurityError(
           "Security error when calling GetDirectory");