old_contents: var ipc = require('ipc');
  
  console.log("Webview Preload: setting up IPC...");
  
  ipc.on('ping', function() {
    // Everything will be fine until the webview src is changed
    console.log("pong");
  });
  
new_contents: var ipc = require('ipc');
  
  console.log("Webview Preload: setting up IPC...");
  
  ipc.on('ping', function() {
    console.log("pong");
  });
  
subject: Update ping.js