* Revert "Make Travis happy again (#4101)" This reverts commitba1577ac9b. * Revert "Support cleaner Dart isolate shutdown handling. (#4096)" This reverts commitb8e222f45c.
* Revert "Make Travis happy again (#4101)" This reverts commitba1577ac9b. * Revert "Support cleaner Dart isolate shutdown handling. (#4096)" This reverts commitb8e222f45c.