In the not so distant future, this could be the question you're asking yourself. Google's upcoming changes, disclosed in a public Google document, reveal how extensions could work in Chrome in the future. This could mean that ad blockers are blocked.
The change comes with good intentions, with Google hoping to improve the way extensions work by allowing users to have more control over what extensions can and can't do. Much like the way application permissions on your phone work.
However, some extensions that rely heavily on an API that allows loading of code from external sources could be heavily affected, namely Ghostery and uBlock. Others like Adblock Plus that make use of basic filtering should still be able to function with some tweaks.
It's no surprise that Google is interested in blocking technology that directly affects their earnings given that they reportedly paid AdBlock Plus in 2015 to white list their own ads.