UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3343.3 Safari/537.36

Steps to reproduce the problem:
1. Open a new incognito window
2. Enter 'view-source:' in the Omnibox

What is the expected behavior?
To either go to the default search engine or display the view-source page as if there was no content at all on the page on the same (incognito) window.

What went wrong?
When visiting, it will create a new tab on the normal window showing the view-source page. Only line 1 without data.
If the normal window is closed and the incognito window is only present (can be multiple), a new normal window will open doing the same thing.

Did this work before? N/A 

Chrome version: 66.0.3343.3  Channel: dev
OS Version: 10.0
Flash Version: 

This also affects Chrome Canary v66.0.3344.0.