Folding Chair

FIG. 1 is a front, left and top perspective view of a folding chair, showing my design. FIG. 2 is a front elevation view thereof. FIG. 3 is a rear elevation view thereof. FIG. 4 is a left side elevation view thereof. FIG. 5 is a right side elevation view thereof. FIG. 6 is a top plan view thereof; and, FIG. 7 is a bottom plan view thereof. The dash-dot-dash lines represent stitching that form part of the claimed design. The dashed broken lines depict portions of the folding chair that form no part of the claimed design.