HTTPS is vital for keeping personal data safe when surfing the web and there's a lot of pressure for website operators to start using it. In Chrome, the browser uses four different icons in the URL bar to indicate just how secure websites are based on their HTTPS use. Not anymore.
While more websites are moving to HTTPS, some of them retain elements that use HTTP instead, the protocol that is less secure. This is usually because they are still using image files on their websites that go through HTTP. You can tell if a website has mixed elements of HTTPS and HTTP in Chrome by looking at the security state icon displayed in the URL bar at the top of the browser. This is indicated by a lock with a yellow "caution triange" icon.
In the newest version of Chrome (version 46), Google has removed this "HTTPS with minor errors" icon. If there's any HTTP element on a website, a blank page icon will show up instead. The end game for Google is to eventually bring down the number of icons to two so a page will come up as either be secure or insecure.
Chrome 46 has launched today for Windows, Mac and Linux.