Although part of Google’s current documentation, Cross Channel conversion tracking will not be supported for new campaigns. This means Google will only be reporting their own conversion data in the AdWords interface. Probably not a bad idea, the reasoning for this is to push tracking towards Google Analytics where it should live anyway.
For more information on setting up conversion tracking in Google Analytics, you can refer to their setup guide : Google Conversion Tracking Setup Guide
Though not as GUI as the Cross Channel tracking in AdWords, it should be a snap to setup and will be less cumbersome for adding new tracking variables in the future.
