{
    "status": "FAIL", 
    "group": "default", 
    "message": "assert_true: expected true got false", 
    "stack": "perf_observer@http://web-platform.test:8000/_mozilla/mozilla/task_queue_throttling.any.js:11:5\nTest.prototype.step@http://web-platform.test:8000/resources/testharness.js:1566:20\nTest.prototype.step_func_done/<@http://web-platform.test:8000/resources/testharness.js:1606:17\n", 
    "subtest": "Throttling the performance timeline task queue.", 
    "test": "/_mozilla/mozilla/task_queue_throttling.any.html", 
    "line": 173699, 
    "action": "test_result", 
    "expected": "PASS"
}