chromium/chrome/test/data/extensions/api_test/default_content_security_policy/manifest.json

{
  "name": "default content security policy tests",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Checks that extensions with version 2 manifests have a default Content-Security-Policy.",
  "background": {
    "persistent": false,
    "page": "test.html"
  }
}