chromium/chrome/test/data/extensions/platform_apps/file_access_restored_test/manifest.json

{
  "name": "Files Preserved Test",
  "version": "1",
  "manifest_version": 2,
  "app": {
    "background": {
      "scripts": ["test.js"]
    }
  },
  "permissions": ["fileSystem", "fileSystem.write", "storage"]
}