Prototype/background.js

chrome.app.runtime.onLaunched.addListener(function() {
  chrome.app.window.create('connectWindow.html', {
    'bounds': {
      'width': 522,
      'height': 253
    },
    minWidth: 522,
    minHeight: 253,
    maxWidth: 522,
    maxHeight: 253
  });
});