chromium/chrome/test/data/extensions/manifest_tests/web_urls_wrong_type.json

{
  "name": "test",
  "manifest_version": 2,
  "version": "1",
  "app": {
    "urls": 42,
    "launch": {
      "web_url": "http://www.google.com/foo.html"
    }
  }
}