It looks like you're referring to a specific technical flag or an element from Chrome’s internal new tab page (like most_visited9 – possibly a grid position or a debugging class).
Open your Chrome inspector, count your shortcuts, and see if there’s a most_visited9 waiting to be used. chrome newtab most_visited9
Here’s a blog post written for developers and power users. Unlocking Chrome’s New Tab Page: What is most_visited9 and How to Tweak Your Top Sites It looks like you're referring to a specific