* class.c (build_vbase_path): Use reverse_path.
	(finish_base_struct): Move warnings for inaccessible bases to
	layout_basetypes.
	(modify_one_vtable): Remove check of TREE_USED (binfo).
	(fixup_vtable_deltas1): Likewise.
	* cp-tree.h (BINFO_INHERITANCE_CHAIN): Document here.
	(xref_tag): Remove binfos parameter.
	(make_binfo): Remove chain parameter.
	(reverse_path): Add copy parameter.
	* decl.c (init_decl_processing): Change calls to xref_tag.
	(xref_tag): Remove binfos parameter.
	(xref_basetypes): Change calls to make_binfo.
	* decl2.c (grok_x_components): Change calls to xref_tag.
	(handle_class_head): Likewise.
	* friend.c (do_friend): Likewise.
	* lex.c (make_lang_type): Change calls to make_binfo.
	* parse.y (structsp): Change calls to xref_tag.
	(named_complex_class_head_sans_basetype): Likewise.
	(named_class_head): Likewise.
	* rtti.c (init_rtti_processing): Likewise.
	* search.c (compute_access): Change calls to reverse_path.
	(dfs_get_vbase_types): Change calls to make_binfo.
	(get_vbase_types): Remove dead code.
	* tree.c (unshare_base_binfos): Change calls to make_binfo.
	(layout_basetypes): Warn here about inaccessible bases.
	(make_binfo): Remove chain parameter.
	(reverse_path): Add copy parameter.

From-SVN: r22021