Fixed getLegacyStats - shouldn't have a JSName annotation. Fixes #33891 R=sigmund@google.com Change-Id: Ie9761ad4f3c69fc875cdb1f0d096f48d1528671b Reviewed-on: https://dart-review.googlesource.com/66400 Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Terry Lucas <terry@google.com>