INTERNAL_BORDER_TOP_LEFT_CORNER 2585 src/frame.c    	     part = INTERNAL_BORDER_TOP_LEFT_CORNER;
INTERNAL_BORDER_TOP_LEFT_CORNER 2601 src/frame.c    	     part = INTERNAL_BORDER_TOP_LEFT_CORNER;
INTERNAL_BORDER_TOP_LEFT_CORNER 35497 src/xdisp.c    	case INTERNAL_BORDER_TOP_LEFT_CORNER: