chromium/chrome/test/data/extensions/api_test/executescript/file_access/manifest.json

{
  "version": "1",
  "manifest_version": 2,
  "name": "Tests whether an extension can inject script into file frames",
  "background": {
    "scripts": ["background.js"],
    "persistent": true
  },
  "permissions": ["<all_urls>", "tabs"]
}