The ornamental design for a chandelier, as shown and described.
FIG. 1 is a top perspective view of the chandelier according to the present invention;
FIG. 2 is a front elevational view thereof, with the rear elevational view, left side elevational view and right side elevational view thereof being identical;
FIG. 3 is a bottom perspective view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The areas shown in dashed lines do not form part of the claimed invention.