Mark recursive_inheritance_test as passing

test/codegen_expected/language/closure6_test.js

 dart_library.library('language/closure6_test', null, /* Imports */[
   'dart_sdk',
   'expect'
 ], function load__closure6_test(exports, dart_sdk, expect) {
   'use strict';
   const core = dart_sdk.core;
   const dart = dart_sdk.dart;
   const dartx = dart_sdk.dartx;
   const expect$ = expect.expect;
   const closure6_test = Object.create(null);
+  let VoidToint = () => (VoidToint = dart.constFn(dart.definiteFunctionType(core.int, [])))();
+  let VoidTonum = () => (VoidTonum = dart.constFn(dart.definiteFunctionType(core.num, [])))();
   let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
   closure6_test.A = class A extends core.Object {
     foo() {
       function length() {
         return 400;
       }
-      dart.fn(length, VoidTodynamic());
+      dart.fn(length, VoidToint());
       let box_0 = 28;
       let x = 29;
-      let f = dart.fn(() => dart.dsend(dart.dsend(dart.dsend(length(), '+', box_0), '+', x), '+', this.bar()), VoidTodynamic());
+      let f = dart.fn(() => dart.notNull(length()) + box_0 + x + dart.notNull(core.num._check(this.bar())), VoidTonum());
       return f();
     }
     bar() {
       return 42;
     }
   };
   dart.setSignature(closure6_test.A, {
     methods: () => ({
       foo: dart.definiteFunctionType(dart.dynamic, []),
       bar: dart.definiteFunctionType(dart.dynamic, [])
     })
   });
   closure6_test.main = function() {
     expect$.Expect.equals(499, new closure6_test.A().foo());
   };
   dart.fn(closure6_test.main, VoidTodynamic());
   // Exports:
   exports.closure6_test = closure6_test;
 });