The ornamental design for a windshieldwiper, as shown and described.
FIG. 1 is a perspective view of a windshield wiper showing my new design;
FIG. 2 is a top plan view of the windshield wiper of FIG. 1;
FIG. 3 is a bottom plan view of the windshield wiper of FIG. 1;
FIG. 4 is a right side elevational view of the windshield wiper of FIG. 1;
FIG. 5 is a left side elevational view of the windshield wiper of FIG. 1;
FIG. 6 is a front elevational view of the windshield wiper of FIG. 1;
FIG. 7 is a rear elevational view of the windshield wiper of FIG. 1; and,
FIG. 8 is a perspective view of the windshield wiper of FIG. 1 and a windshield wiper blade.
The broken line showing of portions of the windshield wiper in FIGS. 1, 3-5 and 7-8 and the wiper blade in in FIG. 8 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.