Check in codegen test expectations.

test/codegen/expect/language/canonical_const2_test.js

Index: test/codegen/expect/language/canonical_const2_test.js
diff --git a/test/codegen/expect/language/canonical_const2_test.js b/test/codegen/expect/language/canonical_const2_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..c9347b2b2bb3effde5dc86c559a9e30f416c582b
--- /dev/null
+++ b/test/codegen/expect/language/canonical_const2_test.js
@@ -0,0 +1,20 @@
+dart_library.library('language/canonical_const2_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__canonical_const2_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 canonical_const2_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  let const$;
+  let const$0;
+  canonical_const2_test.main = function() {
+    expect$.Expect.isFalse(core.identical(const$ || (const$ = dart.constList([1, 2], core.num)), const$0 || (const$0 = dart.constList([1.0, 2.0], core.num))));
+  };
+  dart.fn(canonical_const2_test.main, VoidTodynamic());
+  // Exports:
+  exports.canonical_const2_test = canonical_const2_test;
+});