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chromium/third_party/blink/web_tests/http/tests/security/mask-image-cors-allow-origin-expected.html 

<!DOCTYPE html>
<style>
body { padding: 50px; }

#expected {
  width: 100px;
  height: 100px;
  background-color: green;
}
</style>
<body>
<div id="expected"></div>
</body>