Why Does Google Chrome Dev Channel Show a Cupcake?

My browsing experience depends on cutting edge, possibly unstable code from the Google Chrome dev channel. While I’ve had very few issues, today I woke up to a cupcake in my browser toolbar. Seriously? My first thought was that someone had hacked the Chrome auto-installer with poisoned bits.

I’ll post more info as I find out why there’s a cupcake, but until then – does anyone know why Google Chrome dev channel shows a cupcake?