I noticed this a couple of weeks ago when visiting my (local) bank's website (I'm in Chrome beta, v42 at that point) - the landing page had a red slash through the https. The e-banking site is operated by a third party on a different domain, with certificates which Chrome accepts.
I checked the site through https://www.ssllabs.com/, and was confused when it gave the site an A rating. Eventually I googled the text from the certificate info panel, and that search led me to the blog where Google outlined their deprecation plan.
I contacted the bank and their web host had it updated later that day.
I do wish that Google would give a clearer message to the user when displaying the red slash. It was far from clear to me what the problem was, even after I clicked to check out the purported certificate error.
I checked the site through https://www.ssllabs.com/, and was confused when it gave the site an A rating. Eventually I googled the text from the certificate info panel, and that search led me to the blog where Google outlined their deprecation plan.
I contacted the bank and their web host had it updated later that day.
I do wish that Google would give a clearer message to the user when displaying the red slash. It was far from clear to me what the problem was, even after I clicked to check out the purported certificate error.