chromium/chrome/test/data/extensions/api_test/app_background_page/bg_open/manifest.json

{
  "name": "app_background_page/bg_open",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Test that opening a popup window from a background page works.",
  "background": {
    "page": "test.html"
  },
  "permissions": ["tabs", "http://a.com/*"]
}