This file lists which races (from RACE.IDS) have Infravision as an innate passive ability. Note that it does not set STATE_INFRAVISION.

In BG2EE we have:

2DA V1.0
0
                        VALUE 
ELF                     1
DWARF                   1
GNOME                   1
HALF_ELF                1
HALFORC                 1
GOBLIN                  1
AASIMAR                 1