The ornamental design for a icecase for refrigerator, as shown and described.
FIG. 1 is a perspective view of a ice case for refrigerator showing our new design;
FIG. 2 is a front view thereof where the rear view is a mirror image;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a bottom perspective view thereof; and,
FIG. 8 is a perspective view thereof with the lid being shown in an alternate position; the broken line showing of the fragmented bottle and pouring liquid is included for the purpose of illustrating and forms no part of the claimed design.