chromium/extensions/test/data/platform_app/background.js

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

chrome.app.runtime.onLaunched.addListener(function() {
  chrome.app.window.create('hello.html', {
    'innerBounds': {
      'width': 400,
      'height': 300
    }
  });
});