* cp-tree.h (struct lang_type_class): add field for key method
(cp_global_trees): rename dynamic_classes to keyed_classes
(key_method): add definition
* class.c (finish_struct_1): compute class's key method, and add
the class to keyed_classes list if there is no key method.
* decl.c (finish_function): add class to keyed_classes list if we
see a definition of the class's key method.
* pt.c (instantiate_class_template): add template specialization
of a dynamic class to keyed_classes list.
* decl2.c (key_method): remove
(finish_file): iterate only through keyed_classes list when
deciding whether to emit vtables, remove class from its list after
we do the emission.
From-SVN: r60850
