Chimera Modules

I have a new nexus 6. Came with 5.1 installed. I updated it and it is now running 7 Beta. Found Something unusual today in the settings menu - - under Google settings it has a section called Chimera Modules. Checked another Nexus 6 that I have running the same beta and Chimera modules is not there. Anyone have any idea what this Is? Both have the same beta versions.