The top 5 mobile browsers all allow ad blockers except Chrome. Samsung Internet which is based on the same chromium engine as chrome has had a similar ad block model as Safari for over 1 year now (and is the default browser on Samsung Galaxy devices - https://medium.com/samsung-internet-dev/think-you-know-the-t... )
Yes, the Samsung Internet application is recently (early 2017) available on Nexus devices as well. It's actually a great browser—Chromium under the hood, but supports content blockers, and is much smoother than Chrome itself. I've really enjoyed using it.