UserAgent: Mozilla/5.0 (X11; CrOS x86_64 9334.72.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.140 Safari/537.36
Platform: 9334.72.0 (Official Build) stable-channel caroline

Steps to reproduce the problem:
Please see limitations on the following project:

https://github.com/google/virtualdesktops-extension#user-content-limitations

What is the expected behavior?

What went wrong?
API is lacking to perform management of windows with an extension.

Did this work before? No 

Does this work in other browsers? N/A

Chrome version: 58.0.3029.140  Channel: stable
OS Version: 9334.72.0
Flash Version: Shockwave Flash 25.0 r0

A feature request to support multiple workspaces is not the ask. Please don't merge this ticket into:
https://bugs.chromium.org/p/chromium/issues/detail?id=629871

The ask is additional API's so that an extension could manage windows.