The ornamental design for a legrestdevice, as shown and described.
FIG. 1 is a perspective view of the leg rest device of my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a perspective view thereof with an optional leg rest stacked on top; and,
FIG. 9 is a perspective view of the leg rest device of FIG. 1 with an alternative orientation of the fasteners.
The broken lines shown in FIG. 8 represent environmental subject matter, specifically an optional stacked leg rest device, and form no part of the claimed design.