Check in codegen test expectations.

test/codegen/expect/language/list_tracer_in_map_test.js

Index: test/codegen/expect/language/list_tracer_in_map_test.js
diff --git a/test/codegen/expect/language/list_tracer_in_map_test.js b/test/codegen/expect/language/list_tracer_in_map_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..2671f4adb56c28dea6e5b4e77129a159a8b81431
--- /dev/null
+++ b/test/codegen/expect/language/list_tracer_in_map_test.js
@@ -0,0 +1,31 @@
+dart_library.library('language/list_tracer_in_map_test', null, /* Imports */[
+  'dart_sdk'
+], function load__list_tracer_in_map_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const list_tracer_in_map_test = Object.create(null);
+  let JSArrayOfint = () => (JSArrayOfint = dart.constFn(_interceptors.JSArray$(core.int)))();
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  dart.defineLazy(list_tracer_in_map_test, {
+    get b() {
+      return JSArrayOfint().of([42]);
+    },
+    set b(_) {}
+  });
+  dart.defineLazy(list_tracer_in_map_test, {
+    get a() {
+      return dart.map({foo: list_tracer_in_map_test.b});
+    },
+    set a(_) {}
+  });
+  list_tracer_in_map_test.main = function() {
+    list_tracer_in_map_test.a[dartx.get]('foo')[dartx.clear]();
+    if (list_tracer_in_map_test.b[dartx.length] != 0) dart.throw('Test failed');
+  };
+  dart.fn(list_tracer_in_map_test.main, VoidTodynamic());
+  // Exports:
+  exports.list_tracer_in_map_test = list_tracer_in_map_test;
+});