I claim the ornamental design for paint roller frame, as shown and described.
FIG. 1 is a front perspective view from above of a paint roller frame showing my new design;
FIG. 2 is a rear perspective view from below thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines showing of portions of the article are included for illustrative purposes only and form no part of the claimed design.