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Test Info:

// META: script=resources/throttling.js
setup(() => waitForLoad()
.then(() => "setup done"));
promise_test(t => inFrame(t)
.then(win => busy(100)
.then(() => win.getThrottlingRate(100)))
.then(rate => {
assert_less_than(rate, 10, "Timeout was throttled");
}), "Don't throttle iframe when all budget in parent has been used");