| Ensure PerformanceObserver Exceptions are propogated. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PerformanceObserver callback fired | |
| PASS onerror: EXCEPTION MESSAGE IN CALLBACK | |
| PASS onerror: TypeError: Cannot call a class constructor without |new| | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |