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importScripts("{{location[server]}}/resources/testharness.js");
async_test(function(t) {
const observer = new ReportingObserver(t.step_func_done((reports) => {
done();
}));
observer.observe();
const off = new OffscreenCanvas(1, 1);
const ctx = off.getContext("2d");
ctx.fillRect(0, 0, 1, 1);
// Trigger deprecation
off.toBlob().then(() => {});
}, "Worker should trigger a deprecation report");