chromium/third_party/blink/web_tests/external/wpt/appmanifest/unrecognized-member/unrecognized-member-manual.html

<!DOCTYPE html>
<title>Test that an unrecognized member is ignored</title>
<link rel="help" href="https://www.w3.org/TR/appmanifest/#processing" />
<link rel="manifest" href="resources/unrecognized-member.webmanifest" />
<script src="resources/unrecognized-member-manual.js"></script>
<h1>Testing support for ignoring an unrecognized member</h1>
<p>
  To pass, the application name must be "pass". Parsing must not fail due to the
  presence of the unrecognized members in the manifest.
</p>