chromium/third_party/blink/web_tests/http/tests/security/mime-type-execute-as-html-16.html

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    <p>This test verifies that resources served with a mime type of 'application/x-foo+json'
    is not rendered as HTML. It passes if no "FAIL: ..." alert is present, and if the
    textual content of the frame is visible below.</p>
    <iframe src="resources/send-mime-types.php?mt=application%2Fx-foo%2Bjson"></iframe>
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