CopyInsertDescriptor 1785 src/objects.cc   MaybeObject* maybe_new_map = map()->CopyInsertDescriptor(&new_field,
CopyInsertDescriptor 4508 src/objects.cc       map()->CopyInsertDescriptor(&new_accessors_desc, INSERT_TRANSITION);
CopyInsertDescriptor 4929 src/objects.h    MUST_USE_RESULT MaybeObject* CopyInsertDescriptor(Descriptor* descriptor,