dart2js: support isolates in the startup-emitter.

pkg/compiler/lib/src/js_emitter/startup_emitter/emitter.dart

 // Copyright (c) 2015, 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.startup_emitter;
 
 import 'package:js_runtime/shared/embedded_names.dart' show
     JsBuiltin,
     METADATA,
+    STATIC_FUNCTION_NAME_TO_CLOSURE,
     TYPES;
 
 import '../program_builder/program_builder.dart' show ProgramBuilder;
 import '../model.dart';
 import 'model_emitter.dart';
 import '../../common.dart';
 import '../../elements/elements.dart' show FieldElement;
 import '../../js/js.dart' as js;
 
 import '../../js_backend/js_backend.dart' show
@@ skipping 150 matching lines @@
       case JsBuiltin.getMetadata:
         String metadataAccess =
             _emitter.generateEmbeddedGlobalAccessString(METADATA);
         return js.js.expressionTemplateFor("$metadataAccess[#]");
 
       case JsBuiltin.getType:
         String typesAccess =
             _emitter.generateEmbeddedGlobalAccessString(TYPES);
         return js.js.expressionTemplateFor("$typesAccess[#]");
 
+      case JsBuiltin.createDartClosureFromNameOfStaticFunction:
+        String functionAccess = _emitter.generateEmbeddedGlobalAccessString(
+            STATIC_FUNCTION_NAME_TO_CLOSURE);
+        return js.js.expressionTemplateFor("$functionAccess(#)");
+
       default:
         _compiler.internalError(NO_LOCATION_SPANNABLE,
             "Unhandled Builtin: $builtin");
         return null;
     }
   }
 
   @override
   void invalidateCaches() {
   }
 }