From the (5 paragraph) article: "In the long term, Google eventually plans to reduce Chrome's security states to just two: secure (full HTTPS) and non-secure (everything else)."

And the actual proposal: https://www.chromium.org/Home/chromium-security/marking-http...

See "Marking HTTP as Non-Secure" from Chromium:

https://www.chromium.org/Home/chromium-security/marking-http...

and "Deprecating Non-Secure HTTP" from Mozilla:

https://blog.mozilla.org/security/2015/04/30/deprecating-non...

Some versions of IE with default configuration won't load the insecure content and generate an alert.