Include pages in ChromeApp

http://goo.gl/dt5ZWv

Using this site as a reference, I understand how to create an icon in the chrome app list and click to go to the designated site, but is there a way to move the function to the designated site to index.html with manifest.json?

First of all,

"app":{
      "urls": [
        "index.html"
      ],
  "launch": {
        "web_url": "index.html"
      }
  },

I tried to rewrite it like this, but it didn't work at all.

I would appreciate it if you could let me know if you know how to do it or if it is impossible.

I look forward to your kind cooperation.