Disable node on child when disabled on parent

lib/browser/guest-window-manager.js

@@ -28,6 +28,11 @@ var mergeBrowserWindowOptions = function (embedder, options) {
   if (embedder.browserWindowOptions != null) {
     // Inherit the original options if it is a BrowserWindow.
     mergeOptions(options, embedder.browserWindowOptions)
+
+    // Disable node integration on child window if disabled on parent window
+    if (!embedder.browserWindowOptions.webPreferences.nodeIntegration) {
+      options.webPreferences.nodeIntegration = false
+    }
   } else {
     // Or only inherit web-preferences if it is a webview.
     if (options.webPreferences == null) {