New profiles should be created with valid use stats now ( crbug.com/603640 ).
However, There is currently no way to differentiate a profile that was created just before that CL landed and one that was created 3 years ago if both have not been reused since. This causes problem when determining if a profile is relevant and/or if it should be deleted.
When updating profiles in the DB, if a profile has the invalid use date (0), we should set it to two weeks ago from now.
This code should then be removed in the next version.
Comment 1 by bugdroid1@chromium.org
, Jun 17 2016