The ornamental design for a portableelectronicdeviceholder, as shown and described.
FIG. 1 is a right side perspective view of a portable electronic device holder, shown in use;
FIG. 2 is a front elevation thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a rear elevation thereof;
FIG. 6 is a right side elevation thereof; and,
FIG. 7 is a left side elevation view thereof.
The broken lines depicting a cellular device in FIGS. 1 and 4 forms no part of the claimed design. The dashed lines disclosed in FIGS. 1-6 on the device holder do not form part of the claimed design.