I claim the ornamental design for a case for electronic device, as shown and described.
FIG. 1 is a perspective view of a case for electronic device showing my new design with the case for electronic device in an open position;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a rear perspective view thereof;
FIG. 9 is a bottom perspective view thereof; and,
FIG. 10 is a perspective view thereof showing the case for electronic device in a closed position.
The broken lines immediately adjacent the shaded surfaces represent boundaries of the claimed design. All other broken lines depict unclaimed environment. The broken lines form no part of the claimed design .