Google Chrome and ChromeOS: Cloud print Save to Drive not available

When printing from Chrome and ChromeOS the docs say you should be able to Save to Google Drive.

On my ChromeBook this wasn't available

To resolve this issue, you need to type 'save' into the 'search destinations' dialogue box

After a second or two the 'Save to Google Drive' option will come up, and you can click it.

Thereafter it should be remembered, and even if its not, you can repeat this process.