To begin with, the app now provides support for Google Cloud Print, a way of printing documents to printers from just about anywhere through PCs or Macs that are aware of attached or wireless printers. The app also provides support for Apple's own AirPrint and AirPrint-aware printers.
Any page viewed in Chrome can also be saved as a PDF file to the user's Google Drive through Cloud Print. This is a way to quickly store web pages on Google Drive for download to an iOS device for offline reading.
In addition to the usual stability and security improvements and bug fixes, Chrome also adds fullscreen browsing support for the iPhone and iPod touch. This was implemented in a very intuitive manner; users simply scroll the browser window to the top of the screen to "push" the toolbar off the screen, or scroll back down to view the Google "omnibox."
While the changes are rather limited, they add a tremendous amount of utility to a fast and stable iOS web browser.