dart2js: fix deferred loading in the new emitter.

pkg/compiler/lib/src/js_emitter/program_builder.dart

 // Copyright (c) 2014, 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.
 
 library dart2js.js_emitter.program_builder;
 
 import 'js_emitter.dart' show computeMixinClass;
 import 'model.dart';
 
 import '../common.dart';
@@ skipping 105 matching lines @@
 
     bool containsNativeClasses =
         nativeClasses.length != _unneededNativeClasses.length;
 
     return new Program(
         outputs,
         _buildLoadMap(),
         _buildTypeToInterceptorMap(),
         _task.metadataCollector,
         outputContainsNativeClasses: containsNativeClasses,
-        outputContainsConstantList: _task.outputContainsConstantList);
+        outputContainsConstantList: _task.outputContainsConstantList,
+        hasIsolateSupport: _compiler.hasIsolateSupport);
   }
 
   void _markEagerClasses() {
     _markEagerInterceptorClasses();
   }
 
   /// Builds a map from loadId to outputs-to-load.
   Map<String, List<Fragment>> _buildLoadMap() {
     Map<String, List<Fragment>> loadMap = <String, List<Fragment>>{};
     _compiler.deferredLoadTask.hunksToLoad
@@ skipping 515 matching lines @@
       _registry.registerConstant(outputUnit, constantValue);
       assert(!_constants.containsKey(constantValue));
       String name = namer.constantName(constantValue);
       String constantObject = namer.globalObjectForConstant(constantValue);
       Holder holder = _registry.registerHolder(constantObject);
       Constant constant = new Constant(name, holder, constantValue);
       _constants[constantValue] = constant;
     }
   }
 }