old_contents: let app = require('app');  // Module to control application life.
  let BrowserWindow = require('browser-window');  // Module to create native browser window.
  let process = require('process');
  let path = require('path');
  let fs = require('fs');
  
  // avoid https://github.com/atom/electron/issues/550
  if (process.platform == "darwin") {
    process.env['PATH'] = "/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
  }
  
  // Report crashes to our server.
  require('crash-reporter').start();
  
  // Keep a global reference of the window object, if you don't, the window will
  // be closed automatically when the JavaScript object is garbage collected.
  global.mainWindow = null;
  
  // Quit when all windows are closed.
  app.on('window-all-closed', function() {
    // On OS X it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform != 'darwin') {
      app.quit();
    }
  });
  
  // This method will be called when Electron has finished
  // initialization and is ready to create browser windows.
  app.on('ready', function() {
    let windowSizePath = path.join(app.getPath('userData'), 'window-size.json');
    let windowSize;
    try {
      windowSize = JSON.parse(fs.readFileSync(windowSizePath, 'utf8'));
    } catch (err) {
      windowSize = {width: 1024, height: 600};
    }
  
    console.log(windowSize);
    // Create the browser window.
    global.mainWindow = new BrowserWindow(windowSize);
  
    // and load the index.html of the app.
    global.mainWindow.loadUrl('file://' + __dirname + '/index.html');
  
    global.mainWindow.on('close', () => {
      fs.writeFileSync(windowSizePath, JSON.stringify(mainWindow.getBounds()));
    });
  
    // Emitted when the window is closed.
    global.mainWindow.on('closed', () => {
      // Dereference the window object, usually you would store windows
      // in an array if your app supports multi windows, this is the time
      // when you should delete the corresponding element.
      global.mainWindow = null;
    });
  });
  
new_contents: let app = require('app');  // Module to control application life.
  let BrowserWindow = require('browser-window');  // Module to create native browser window.
  let process = require('process');
  let path = require('path');
  let fs = require('fs');
  
  // avoid https://github.com/atom/electron/issues/550
  if (process.platform == "darwin") {
    process.env['PATH'] = "/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
  }
  
  // Report crashes to our server.
  require('crash-reporter').start();
  
  // Keep a global reference of the window object, if you don't, the window will
  // be closed automatically when the JavaScript object is garbage collected.
  global.mainWindow = null;
  
  // Quit when all windows are closed.
  app.on('window-all-closed', function() {
    // On OS X it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform != 'darwin') {
      app.quit();
    }
  });
  
  // This method will be called when Electron has finished
  // initialization and is ready to create browser windows.
  app.on('ready', function() {
    let windowSizePath = path.join(app.getPath('userData'), 'window-size.json');
    let windowSize;
    try {
      windowSize = JSON.parse(fs.readFileSync(windowSizePath, 'utf8'));
    } catch (err) {
      windowSize = {width: 1024, height: 600};
    }
  
    // Create the browser window.
    global.mainWindow = new BrowserWindow(windowSize);
  
    // and load the index.html of the app.
    global.mainWindow.loadUrl('file://' + __dirname + '/index.html');
  
    global.mainWindow.on('close', () => {
      fs.writeFileSync(windowSizePath, JSON.stringify(mainWindow.getBounds()));
    });
  
    // Emitted when the window is closed.
    global.mainWindow.on('closed', () => {
      // Dereference the window object, usually you would store windows
      // in an array if your app supports multi windows, this is the time
      // when you should delete the corresponding element.
      global.mainWindow = null;
    });
  });
  
subject: Remove console.log