Yes, those were chair tracks.
Here's a fun thing: for the first couple of seasons the bridge carpet was continuous with the floor of the turbolifts - there was no gap to indicate that the turbolift floor was a separate construction from the bridge floor.
This was pointed out to a TNG artist on either Compuserve or GEnie during the third year of the show, and a dark strip was placed across the floor under the turbolift doors.