* error.c (pp_ggc_formatted_text): New.
	(type_as_string): Use it in lieu of pp_formatted_text.
	(type_as_string_translate): Likewise.
	(expr_as_string): Likewise.
	(decl_as_string): Likewise.
	(decl_as_string_translate): Likewise.
	(lang_decl_name): Likewise.
	(decl_to_string): Likewise.
	(expr_to_string): Likewise.
	(fndecl_to_string): Likewise.
	(parm_to_string): Likewise.
	(type_to_string): Likewise.
	(args_to_string): Likewise.
	(subst_to_string): Likewise.

From-SVN: r201873