UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.14942

Steps to reproduce the problem:
1. Open http://jsbin.com/wabohaxanu/edit?html,css,output
2. Notice the failures

What is the expected behavior?
The failures pass

What went wrong?
Blink doesn't seem to serialize nor store the specified style of custom properties for inherit/initial/unset.

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 53.02785  Channel: n/a
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0

Firefox: No repro
Edge: Currently implementing, it will not repro when we ship custom props