'On Thursday, Google launched "App Runtime for Chrome (Beta)" which allows Android apps to run on Chrome OS without the need for porting. At the moment, only Duolingo, Evernote, Sight Words, and Vine are available on the platform with the rest of the Play Store's offerings to come later. Google "built an entire Android stack into Chrome OS using Native Client" in order to achieve this.'

-- source: http://tech.slashdot.org/story/14/09/12/0050206

Cheers, Peter