chrome extension stackapp auth 2.0 problem

[Lu Niu]

I follow the tutorial here https://developer.chrome.com/apps/app_identity and use the api here https://developer.chrome.com/apps/identity but with no luck. Could anyone point out is anything wrong in this code?

function onGoogleLibraryLoaded() {

    var redirect_uri = chrome.identity.getRedirectURL("http://qqibrow.github.io");

    var full_url =  "https://stackexchange.com/oauth/dialog?client_id=4716&redirect_uri=" + redirect_uri;

    console.log(redirect_uri);

    console.log(full_url);

    chrome.identity.launchWebAuthFlow({

        'url': full_url,

        'interactive': true

    }, authorizationCallback);

}

var authorizationCallback = function (data) {

    // should print out redirect_uri with auth_token if succeed.

    console.log(data);

};

// manifest.json

"permissions": [

    "activeTab",

     "identity",

    "https://ajax.googleapis.com/",

      "https://stackexchange.com/*",

        "https://stackexchange.com/oauth/*",

        "http://qqibrow.github.io/*"

  ],

   "web_accessible_resources": [

        "http://qqibrow.github.io/*",

        "https://stackexchange.com/*",

      

If i try https://stackexchange.com/oauth/dialog?client_id=4716&redirect_uri=http://qqibrow.github.io it does work. But with above code, I always got a error page from stackexchange, saying that 

Application Login Failure error description: Cannot return to provided redirect_uri.