chromium/chrome/test/data/extensions/platform_apps/web_view/nopermission/manifest.json

{
  "name": "<webview>",
  "manifest_version": 2,
  "description": "Checks that <webview> elements lack an API without the webview permission",
  "version": "2",
  "app": {
    "background": {
      "scripts": ["test.js"]
    }
  }
}