Material Design guideline for Google Map’s side pane?

Here is what happens when you click on an icon in an "old-style" Google map:

You get an InfoWindow, and clicking "more info" opens a new tab with a google search of the icon's subject.

Here is what happens when you click on an icon in a "new-style" Google map:

You get more information outside the map that you can then interact with.

I understand why the new way is better- you can show more information, it's more mobile-friendly, and it helps de-clutter the map.

My question is: Is there a specific material design guideline that motivated this change from the old InfoWindow style to the new "sidebar" style? I doubt there's something as obvious as "don't use InfoWindows on maps anymore, use this instead", but I'm looking for something a little more official than me just guessing.

Bonus question: What is that sidebar component called?

The reason I'm asking is: At my job we have a product that uses the Google Map api to show various hierarchical information: you click on a dot on the map, that pops up an expanded view of the data on the map, you click in the expanded view and you get an InfoWindow with more details. The clients don't like that display, and I'm thinking that we should get away from on-the-map displays and move towards this new-style sidebar interface. I'm looking for something a little more official than my humble opinion, but nothing in the material design docs really jump out at me.