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chromium/content/test/data/web_bundle/invalid_web_bundle.html 

<!DOCTYPE html>
<script type="webbundle">
{
  "source": "invalid_web_bundle.wbn",
  "resources": ["uuid-in-package:429fcc4e-0696-4bad-b099-ee9175f023ae"]
}
</script>
<body>
</body>