What is the function of "chrome" in Kibana (source code)

Hi all,

I've been trying to understand the code of some Kibana plugins and I see chrome get used quite a bit. It is imported from ui/chrome. I've tried reading through the code but I might need some background knowledge to better understand. Can someone please point me to where I can read/find out more about chrome.

From what I understand, the chrome is the GUI. It's an euphemism for the graphical framework and elements surrounding the content.
A good example is Facebook apps: apps in Facebook are displayed in the Facebook chrome (the whole UI that surrounds the app, like sidebar and stuff)