What files are result of navmesh baking?

I use subversion to control a project. After navmesh bake, I can see what files are output (they are unversioned), after I commit these files. I let others update their project, but no one find the navmesh take effect, since we think if this is valid, the navmesh display panel can use to toggle the navmesh on / off.

What I guess is I must leave something un-commit, but no clue, need help.