We claim the ornamental design for a case for a computing device, as shown and described.
FIG. 1 is a back perspective view of the case for a computing device;
FIG. 2 is a front perspective view of the case for a computing device shown in FIG. 1;
FIG. 3 is a back plan view of the case for a computing device shown in FIG. 1;
FIG. 4 is a front plan view of the case for a computing device as shown in FIG. 1;
FIG. 5 is a left plan view of the case for a computing device as shown in FIG. 1;
FIG. 6 is a right plan view of the case for a computing device as shown in FIG. 1;
FIG. 7 is a top plan view of the case for a computing device as shown in FIG. 1; and,
FIG. 8 is a bottom plan view of the case for a computing device as shown in FIG. 1.
The broken lines represent environment that forms no part of the claim. The boundary lines represent a boundary of the claim. The case for a computing device is shown with a symbolic break in the width and length. The appearance of any portion of the article between the symbolic break lines, the broken lines and the boundary lines form no part of the claim.