Check in codegen test expectations.

test/codegen/expect/language/top_level_var_test.js

Index: test/codegen/expect/language/top_level_var_test.js
diff --git a/test/codegen/expect/language/top_level_var_test.js b/test/codegen/expect/language/top_level_var_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..d21ab87d31ea4fe1a141cab8a6a98dcec8340e94
--- /dev/null
+++ b/test/codegen/expect/language/top_level_var_test.js
@@ -0,0 +1,38 @@
+dart_library.library('language/top_level_var_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__top_level_var_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 top_level_var_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  top_level_var_test.a = null;
+  top_level_var_test.b = null;
+  top_level_var_test.TopLevelVarTest = class TopLevelVarTest extends core.Object {
+    static testMain() {
+      expect$.Expect.equals(null, top_level_var_test.a);
+      expect$.Expect.equals(null, top_level_var_test.b);
+      top_level_var_test.a = top_level_var_test.b = 100;
+      top_level_var_test.b = dart.dsend(top_level_var_test.b, '+', 1);
+      expect$.Expect.equals(100, top_level_var_test.a);
+      expect$.Expect.equals(101, top_level_var_test.b);
+      expect$.Expect.equals(111, top_level_var_test.x);
+      expect$.Expect.equals(112, top_level_var_test.y);
+    }
+  };
+  dart.setSignature(top_level_var_test.TopLevelVarTest, {
+    statics: () => ({testMain: dart.definiteFunctionType(dart.dynamic, [])}),
+    names: ['testMain']
+  });
+  top_level_var_test.x = 2 * 55 + 1;
+  top_level_var_test.y = top_level_var_test.x + 1;
+  top_level_var_test.main = function() {
+    top_level_var_test.TopLevelVarTest.testMain();
+  };
+  dart.fn(top_level_var_test.main, VoidTodynamic());
+  // Exports:
+  exports.top_level_var_test = top_level_var_test;
+});