chromium/chrome/test/data/extensions/api_test/browser_action/no_icon/manifest.json

{
  "name": "A browser action with no icon that makes the page red",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": ["background.js"]
  },
  "permissions": [
    "tabs", "http://*/*"
  ],
  "browser_action": {
      "name": "Make this page red"
  }
}