Pushes all the cookies from the service to the browser and verifies if all cookies were
stored.
function push() {
        var name,
            value,
            browserCookies,
            updated;

        //delete any cookies deleted in $cookies
        for (name in lastCookies) {
          if (isUndefined(cookies[name])) {
            $browser.cookies(name, undefined);
          }
        }

        //update all cookies updated in $cookies
        for(name in cookies) {
          value = cookies[name];
          if (!angular.isString(value)) {
            value = '' + value;
            cookies[name] = value;
          }
          if (value !== lastCookies[name]) {
            $browser.cookies(name, value);
            updated = true;
          }
        }

        //verify what was actually stored
        if (updated){
          updated = false;
          browserCookies = $browser.cookies();

          for (name in cookies) {
            if (cookies[name] !== browserCookies[name]) {
              //delete or reset all cookies that the browser dropped from $cookies
              if (isUndefined(browserCookies[name])) {
                delete cookies[name];
              } else {
                cookies[name] = browserCookies[name];
              }
              updated = true;
            }
          }
        }
      }