Ensure PerformanceObservers are notified in order of registration (observe).

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS PerformanceObserver 1 callback fired
PASS count is 1
PASS PerformanceObserver 2 callback fired
PASS count is 2
PASS PerformanceObserver 3 callback fired
PASS count is 3
PASS PerformanceObserver 4 callback fired
PASS count is 4
PASS PerformanceObserver 5 callback fired
PASS count is 5
PASS PerformanceObserver 6 callback fired
PASS count is 6
PASS successfullyParsed is true

TEST COMPLETE