This page contains instructions on how to build your Unity application for ChromeOS. ChromeOS supports the Google Play Store and Android applications which means, to build an application for ChromeOS, Unity actually builds an Android application.
To configure your application to support ChromeOS devices:
After you configure your project to build for ChromeOS, you can start the build process. The build process for ChromeOS is the same as the one for Android. The only difference is if you want to use the Build and Run option to immediately run the build on a ChromeOS device. On ChromeOS, you must use Android Debug Bridge to connect to the target device. For information on how to do this, refer to Android Debug Bridge for ChromeOS devices. To build your application for ChromeOS, follow the instructions for Building Apps for Android.