Please try installing ARC Welder App on your Chrome book and using ARC Welder, you can install Android App on the Chromebook.
Before that, I would suggest you check if the App available on Chrome Store.
How to use ARC Welder : http://www.howtogeek.com/214734/how-to-use-googles-arc-welder-to-run-android-apps-in-chrome/
More information : http://www.zdnet.com/article/google-sets-android-apps-free-to-run-on-chrome-os/
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