Check in codegen test expectations.

test/codegen/expect/language/cascade_in_expression_function_test.js

+dart_library.library('language/cascade_in_expression_function_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__cascade_in_expression_function_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 cascade_in_expression_function_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  cascade_in_expression_function_test.makeMap = function() {
+    return (() => {
+      let _ = core.Map.new();
+      _[dartx.set](3, 4);
+      _[dartx.set](0, 11);
+      return _;
+    })();
+  };
+  dart.fn(cascade_in_expression_function_test.makeMap, VoidTodynamic());
+  cascade_in_expression_function_test.MyClass = class MyClass extends core.Object {
+    foo() {
+      return (() => {
+        this.bar(3);
+        this.baz(4);
+        return this;
+      })();
+    }
+    bar(x) {
+      return x;
+    }
+    baz(y) {
+      return dart.dsend(y, '*', 2);
+    }
+  };
+  dart.setSignature(cascade_in_expression_function_test.MyClass, {
+    methods: () => ({
+      foo: dart.definiteFunctionType(dart.dynamic, []),
+      bar: dart.definiteFunctionType(dart.dynamic, [dart.dynamic]),
+      baz: dart.definiteFunctionType(dart.dynamic, [dart.dynamic])
+    })
+  });
+  cascade_in_expression_function_test.main = function() {
+    let o = new cascade_in_expression_function_test.MyClass();
+    expect$.Expect.equals(o.foo(), o);
+    let g = cascade_in_expression_function_test.makeMap();
+    expect$.Expect.equals(dart.dindex(g, 3), 4);
+    expect$.Expect.equals(dart.dindex(g, 0), 11);
+  };
+  dart.fn(cascade_in_expression_function_test.main, VoidTodynamic());
+  // Exports:
+  exports.cascade_in_expression_function_test = cascade_in_expression_function_test;
+});