This test checks whether event handlers for outstanding XMLHttpRequests survive garbage collection.

See http://bugzilla.opendarwin.org/show_bug.cgi?id=9113 REGRESSION (14581): XMLHttpRequest never calls onreadystatechange with a readystate == 4

If the test passes, you'll see a series of 'PASS' messages below.

PASS: event handler fired after garbage collection.
PASS: event handler fired after garbage collection.
PASS: event handler fired after garbage collection.