chromium/chrome/test/data/web_apps/tab_strip_customizations.json

{
  "name": "Manifest with tabbbed",
  "icons": [
    {
      "src": "basic-192.png",
      "sizes": "192x192",
      "type": "image/png"
    }
  ],
  "start_url": "tab_strip_customizations.html",
  "display": "standalone",
  "display_override": [ "tabbed" ],
  "tab_strip": {
    "home_tab": {
      "icons" : [
        {
          "src": "blue-192.png",
          "sizes": "200x200 192x192 300x300",
          "type": "image/png"
        }
      ],
      "scope_patterns": [
        {"pathname": "/:foo/title_appname_prefix.html"}
      ]
    },
    "new_tab_button": {
      "url": "favicon_only.html"
    }
  }
}