Check in codegen test expectations.

test/codegen/expect/language/proxy3_test_none_multi.js

Index: test/codegen/expect/language/proxy3_test_none_multi.js
diff --git a/test/codegen/expect/language/proxy3_test_none_multi.js b/test/codegen/expect/language/proxy3_test_none_multi.js
new file mode 100644
index 0000000000000000000000000000000000000000..17ce5dc1a6ad07b40d1958f8d0816a64e58c66b0
--- /dev/null
+++ b/test/codegen/expect/language/proxy3_test_none_multi.js
@@ -0,0 +1,20 @@
+dart_library.library('language/proxy3_test_none_multi', null, /* Imports */[
+  'dart_sdk'
+], function load__proxy3_test_none_multi(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const proxy3_test_none_multi = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  proxy3_test_none_multi.isFalse = core.identical(-0.0, 0);
+  proxy3_test_none_multi.validProxy = proxy3_test_none_multi.isFalse ? null : core.proxy;
+  proxy3_test_none_multi.invalidProxy = proxy3_test_none_multi.isFalse ? core.proxy : null;
+  proxy3_test_none_multi.ValidProxy = class ValidProxy extends core.Object {};
+  proxy3_test_none_multi.InvalidProxy = class InvalidProxy extends core.Object {};
+  proxy3_test_none_multi.main = function() {
+  };
+  dart.fn(proxy3_test_none_multi.main, VoidTodynamic());
+  // Exports:
+  exports.proxy3_test_none_multi = proxy3_test_none_multi;
+});