Check in codegen test expectations.

test/codegen/expect/language/gvn_field_access_test.js

+dart_library.library('language/gvn_field_access_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__gvn_field_access_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 gvn_field_access_test = Object.create(null);
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  gvn_field_access_test.A = class A extends core.Object {
+    new() {
+      this.y = 0;
+    }
+    foo(x) {
+      let t = this.y;
+      if (dart.notNull(t) < dart.notNull(core.num._check(x))) {
+        for (let i = this.y; dart.notNull(i) < dart.notNull(core.num._check(x)); i = dart.notNull(i) + 1) {
+          this.y = dart.notNull(this.y) + 1;
+        }
+      }
+      return this.y;
+    }
+  };
+  dart.setSignature(gvn_field_access_test.A, {
+    methods: () => ({foo: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])})
+  });
+  gvn_field_access_test.main = function() {
+    expect$.Expect.equals(3, new gvn_field_access_test.A().foo(3));
+  };
+  dart.fn(gvn_field_access_test.main, VoidTovoid());
+  // Exports:
+  exports.gvn_field_access_test = gvn_field_access_test;
+});