You can download the update directly on your device through the Apple App Store or by using the link which follows:
Google Cloud Print allows you print to any printer which is connected to a computer running Chrome. You can even save the document you want to print as a PDF and save it to your Google Drive for later access.
With Google migrating from WebKit to their own Blink web engine, it will be interesting to see Chrome's future on the iOS platform which only allows WebKit browsers.