After the latest update (or a very recent one if not the latest; basically it showed up sometime leading up to or including
Version 47.0.2526.111 (64-bit), which is what is currently running), the Chrome icon is showing a numeral one in the bottom-right corner (see image below). This doesn't appear to correspond to downloads, as I've cleared the download list on both profiles. It also doesn't appear to correspond to profile, as the circle with a 1 in it doesn't correspond with either of the profiles (I came across an article stating that the pizza icon that had shown up for someone was corresponding to the user), and it doesn't change based on active window.
Does anyone know what this is for?