decl.c (cp_binding_level::this_entity): Rename from this_class.

decl.c (cp_binding_level::this_entity): Rename from this_class.

	* decl.c (cp_binding_level::this_entity): Rename from this_class.
	(cxx_scope_descriptor): New function.
	(cxx_scope_debug): Likewise.
	(push_binding_level): Use it.
	(pop_binding_level): Likewise.
	(suspend_binding_level): Likewise.
	(resume_binding_level): Likewise.
	(pushlevel_class): Adjust use of this_class.
	(pushtag): Likewise.
	(lookup_name_real): Likewise.
	(global_scope_name): New variable.
	(initialize_predefined_identifiers): Initialize it.
	(push_namespace): Use it.
	(make_cxx_scope): New function.
	(pushlevel): Use it.
	(pushlevel_class): Likewise.
	(push_binding_level): Simplify.  Loose the last two arguments.
	(make_binding_level): Remove.
	(initial_push__namespace_scope): New function.
	(push_namespace): Use it.  Simplify.
	(cxx_init_decl_processing): Likewise.
	(declare_namespace_level): Remove.

From-SVN: r67269