Bug 903083

data_test.js

(function() {
  window.get = function(tokens, cb) {
    var data = {
      method: "getValues",
      tokens: tokens
    };
    window.self.port.emit('message', data);
    window.self.port.once('getSuccess', function(message) {
      console.log("Got success", JSON.stringify(message.tokens));
      if (cb) {
        return cb(message.tokens);
      }
    });
  };

  for (var i = 0; i < 5; i++) {
    window.get(['api_token', 'github_token'], function(tokens) {
      console.log("TOKENS", JSON.stringify(tokens));
    });
  }

}).call(this);

lib_main.js

var pageMod = require('sdk/page-mod');
var self = require('sdk/self');

var mod = pageMod.PageMod({
  include: "*",
  contentScriptFile: [
    self.data.url('test.js')
  ],
  onAttach: function(worker) {
    worker.port.on('message', function(message) {
      res = {};
      message.tokens.forEach(function(getKey) {
        res[getKey] = ss.storage[getKey];
      });
      worker.port.emit('getSuccess', {
        method: 'getSuccess',
        tokens: res
      });
    });
  },
});