UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10888.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3494.0 Safari/537.36
Platform: 10888.0.0 (Official Build) dev-channel eve

Steps to reproduce the problem:
I would like to propose a method that exposes a way to pass data to a ChromeOS instance from within a Crostini container. The way I see it is that there are a few ways to expose this:

1) create a way to expose an internal IP address of the ChromeOS device, maybe bind it to something like chromeos.local

2) Expose a local API that can be used to pass data to the host machine. This is sort of already being done with garcon. 

What is the expected behavior?

What went wrong?
No current way to accomplish this

Did this work before? N/A 

Chrome version: 69.0.3494.0  Channel: dev
OS Version: 10888.0.0
Flash Version: 30.0.0.134

Possible Use Case : If I want to create a Linux Application that connects to a ChromeOS Extension for easier control.