Steps as of Chrome v79 (2/24/2020):
Older Chrome Versions:
timmmy_42 answers this on: https://productforums.google.com/forum/#!topic/chrome/OrwppKWbKnc
In the address bar at the right end should be a 'shield' icon, you can click on that to run insecure content.
This worked for me in Chromium-dev Version 36.0.1933.0 (262849).