Google has added the ability to see the top web sites that are using certain features built into Chrome. Google collects anonymous usage statistics for UseCounter tracked features built in Chrome to see how often these features are being used. The data is useful for Chromium developers as it allows them to see sites using newly released features or those that will soon be deproceded. Google is now also showing the list of domains using the CookieGet API that are being actively used by certain features in order to let developers see how they are using these features.
Source: https://www.bleepingcomputer.com/news/google/google-now-publicly-lists-sites-using-chrome-platform-features/