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<!DOCTYPE HTML>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title>Long Animation Frame Timing: iframes</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/common/utils.js"></script>
<script src="/page-visibility/resources/window_state_context.js"></script>
<script src="resources/utils.js"></script>
<body>
<div id="log"></div>
<script>
promise_test(async t => {
const {minimize, restore} = window_state_context(t);
await minimize();
expect_no_long_frame(busy_wait, t);
await restore();
expect_long_frame(busy_wait, t);
}, 'Invisible windows do not report long animation frames');
</script>
</body>
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