UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36

Steps to reproduce the problem:
1. Open DevTools
2. Press cmd + shift + p to open the new Command Menu
3. Search for "Disable CSS"

What is the expected behavior?
"Disable CSS" should appear

What went wrong?
"Disable CSS" is not a command currently available in the new Command Menu

Did this work before? No 

Chrome version: 51.0.2704.106  Channel: n/a
OS Version: OS X 10.11.6
Flash Version: Shockwave Flash 22.0 r0

I made a similar case for disabling JS here https://bugs.chromium.org/p/chromium/issues/detail?id=619889

As part of my job as a web designer I need to test that sites are accessible with/without CSS. Therefore there are periods where I will need to toggle CSS off/on to check how the page renders raw.

Currently the only way I know to do this is to comment out CSS links in my code. Using the Command Menu to do this would be very helpful.

The Command Menu is great addition for power users who are frequently in DevTools and I thought this would be a perfect use case.