The ornamental design for a surfaceconfiguration of a front bumper for a vehicle, as shown and described.
FIG. 1 is a left perspective view of a surface configuration of a front bumper for a vehicle according to my novel design, the right perspective view being mirror symmetrical;
FIG. 2 is a front view thereof;
FIG. 3 is a left side view thereof; and,
FIG. 4 is a right side view thereof.
The broken lines are for illustrative purposes only and form no part of the claimed design.