Check in codegen test expectations.

test/codegen/expect/language/prefix24_test.js

Index: test/codegen/expect/language/prefix24_test.js
diff --git a/test/codegen/expect/language/prefix24_test.js b/test/codegen/expect/language/prefix24_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..cd4b2b853a4e599a3727413976b92b46c6606083
--- /dev/null
+++ b/test/codegen/expect/language/prefix24_test.js
@@ -0,0 +1,42 @@
+dart_library.library('language/prefix24_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__prefix24_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 prefix24_test = Object.create(null);
+  const prefix24_lib1 = Object.create(null);
+  const prefix24_lib2 = Object.create(null);
+  const prefix24_lib3 = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  prefix24_test.main = function() {
+    expect$.Expect.equals("static method bar of class X", prefix24_lib3.X.bar());
+    expect$.Expect.equals("prefix24_lib2_bar", prefix24_lib1.lib1_foo());
+  };
+  dart.fn(prefix24_test.main, VoidTodynamic());
+  prefix24_lib1.lib1_foo = function() {
+    return prefix24_lib2.bar();
+  };
+  dart.fn(prefix24_lib1.lib1_foo, VoidTodynamic());
+  prefix24_lib2.bar = function() {
+    return "prefix24_lib2_bar";
+  };
+  dart.fn(prefix24_lib2.bar, VoidTodynamic());
+  prefix24_lib3.X = class X extends core.Object {
+    static bar() {
+      return "static method bar of class X";
+    }
+  };
+  dart.setSignature(prefix24_lib3.X, {
+    statics: () => ({bar: dart.definiteFunctionType(dart.dynamic, [])}),
+    names: ['bar']
+  });
+  // Exports:
+  exports.prefix24_test = prefix24_test;
+  exports.prefix24_lib1 = prefix24_lib1;
+  exports.prefix24_lib2 = prefix24_lib2;
+  exports.prefix24_lib3 = prefix24_lib3;
+});