Better fix for client tests.

frog/corejs.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Generates JS helpers for dart:core. This used to be in a file "core.js".
  * Having them in Dart code means we can easily control which are generated.
  */
 // TODO(jmesserly): one idea to make this cleaner: put these as private "native"
 // methods somewhere in a library that we import. This would be rather elegant
@@ skipping 126 matching lines @@
     _usedOperators[name] = code;
   }
 
   void generate(CodeWriter w) {
     if (useVarMethod) {
       useTypeNameOf = true;
       w.writeln(@"""
 function $varMethod(name, methods) {
   Object.prototype[name] = function() {
     $patchMethod(this, name, methods);
-    this[name].apply(this, Array.prototype.slice.call(arguments));
+    return this[name].apply(this, Array.prototype.slice.call(arguments));
   };
 }
 function $patchMethod(obj, name, methods) {
   // Get the prototype to patch.
   // Don't overwrite an existing stub, like the one on Object.prototype
   var proto = Object.getPrototypeOf(obj);
   if (!proto || proto.hasOwnProperty(name)) proto = obj;
   var method;
   while (obj && !(method = methods[obj.$typeNameOf()])) {
     obj = Object.getPrototypeOf(obj);
@@ skipping 226 matching lines @@
 Object.prototype.$setindex = function(i, value) { return this[i] = value; }
 Array.prototype.$setindex = function(i, value) { return this[i] = value; }""");
     }
 
     // Write operator helpers
     for (var opImpl in orderValuesByKeys(_usedOperators)) {
       w.writeln(opImpl);
     }
   }
 }