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Test Info:

<!doctype html>
<title>visibilitychange fires on unload</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
async_test(function(t) {
var w = window.open("resources/unload.html");
window.onmessage = t.step_func(function(event) {
if (event.data === "close") {
w.close();
return;
}
assert_equals(event.data, "hidden");
t.done();
});
});
</script>