Check in codegen test expectations.

test/codegen/expect/language/type_guard_conversion_test.js

Index: test/codegen/expect/language/type_guard_conversion_test.js
diff --git a/test/codegen/expect/language/type_guard_conversion_test.js b/test/codegen/expect/language/type_guard_conversion_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..fdafe1469163c3f6799e8565f07088cf34efa953
--- /dev/null
+++ b/test/codegen/expect/language/type_guard_conversion_test.js
@@ -0,0 +1,30 @@
+dart_library.library('language/type_guard_conversion_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__type_guard_conversion_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 type_guard_conversion_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  type_guard_conversion_test.foo = function() {
+    return 'bar';
+  };
+  dart.fn(type_guard_conversion_test.foo, VoidTodynamic());
+  type_guard_conversion_test.main = function() {
+    let a = type_guard_conversion_test.foo();
+    let b = 'c';
+    do {
+      b = core.String._check(dart.dindex(a, 2));
+    } while (b != 'r');
+    if (core.Comparable.is(a)) {
+      a = dart.dsend(a, '+', a);
+    }
+    expect$.Expect.equals('barbar', a);
+  };
+  dart.fn(type_guard_conversion_test.main, VoidTodynamic());
+  // Exports:
+  exports.type_guard_conversion_test = type_guard_conversion_test;
+});