The ornamental design for a windshieldscraper, as shown and described.
FIG. 1 is a front view of a windshield scraper showing my new design;
FIG. 2 is a rear view of the windshield scraper;
FIG. 3 is a right side view of the windshield scraper;
FIG. 4 is a left side view of the windshield scraper;
FIG. 5 is a top view of the windshield scraper;
FIG. 6 is a bottom view of the windshield scraper; and,
FIG. 7 is a rear side perspective view of the windshield scraper being held.
The broken lines adjacent to an outer perimeter in FIG. 6 are illustrative of a portion of the device forming no part of the claimed design. The broken lines in FIG. 7 are illustrative of environmental structure forming no part of the claimed design.