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

{
  "name": "Debugger IsDeveloperMode Histogram Test",
  "manifest_version": 2,
  "version": "0.1",
  "permissions": ["debugger", "tabs"],
  "background": {
    "scripts": ["background.js"]
  }
}