Check in codegen test expectations.

test/codegen/expect/language/optimized_lists_test.js

+dart_library.library('language/optimized_lists_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__optimized_lists_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 optimized_lists_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let dynamicTodynamic = () => (dynamicTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [dart.dynamic])))();
+  optimized_lists_test.main = function() {
+    for (let i = 0; i < 20; i++) {
+      optimized_lists_test.test(2);
+    }
+  };
+  dart.fn(optimized_lists_test.main, VoidTodynamic());
+  let const$;
+  optimized_lists_test.test = function(n) {
+    let a = core.List.new();
+    let b = core.List.new(10);
+    let c = const$ || (const$ = dart.constList([1, 2, 3, 4], core.int));
+    a[dartx.add](4);
+    b[dartx.set](0, 5);
+    expect$.Expect.equals(4, a[dartx.get](0));
+    expect$.Expect.equals(5, b[dartx.get](0));
+    expect$.Expect.equals(2, c[dartx.get](1));
+    let v = c[dartx.get](core.int._check(n));
+    expect$.Expect.equals(v, c[dartx.get](core.int._check(n)));
+  };
+  dart.fn(optimized_lists_test.test, dynamicTodynamic());
+  // Exports:
+  exports.optimized_lists_test = optimized_lists_test;
+});