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async function createIsolatedFrame(origin, headers) {
const parent = document.createElement('iframe');
const parent_loaded = new Promise(r => parent.onload = () => { r(parent); });
const error = new Promise(r => parent.onerror = r);
parent.src = origin + "/common/blank.html?pipe=" + headers;
parent.anonymous = false;
document.body.appendChild(parent);
return [parent_loaded, error];
}
async function IsCrossOriginIsolated(from_token) {
const reply_token = token();
send(from_token, `
send("${reply_token}", self.crossOriginIsolated);
`);
const reply = await receive(reply_token);
assert_true(reply.match(/true|false/) != null);
return reply == 'true';
}