PointersUpdatingVisitor 3325 src/mark-compact.cc   PointersUpdatingVisitor updating_visitor(heap());
PointersUpdatingVisitor 4132 src/mark-compact.cc   PointersUpdatingVisitor v(heap);
PointersUpdatingVisitor 4137 src/mark-compact.cc       PointersUpdatingVisitor::UpdateSlot(heap, slot);
PointersUpdatingVisitor 4150 src/mark-compact.cc   PointersUpdatingVisitor v(heap);
PointersUpdatingVisitor 4156 src/mark-compact.cc         PointersUpdatingVisitor::UpdateSlot(heap, slot);