src/cobalt/storage/upgrade/testdata/extra_fields_v1.json

UPG0
{
  "cookies": [
    {
      "url": "https://www.example.com",
      "name": "cookie_name",
      "value": "cookie_value",
      "unexpected": "dummy_value"
    }
  ],
  "local_storage_entries": [
    {
      "key": "key-1",
      "value": "value-1",
      "unexpected": "dummy_value"
    },
    {
      "key": "key-2",
      "value": "value-2"
    }
  ]
}