Add NativeEnqueuer to work with the Enqueuer.

sdk/lib/_internal/compiler/implementation/lib/isolate_patch.dart

 // Copyright (c) 2012, 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.
 
 // Patch file for the dart:isolate library.
 
 import 'dart:uri';
 
 /**
  * Called by the compiler to support switching
@@ skipping 375 matching lines @@
   void terminate() {}  // Nothing useful to do here.
 }
 
 /**
  * A stub for interacting with a manager built on a web worker. This
  * definition uses a 'hidden' type (* prefix on the native name) to
  * enforce that the type is defined dynamically only when web workers
  * are actually available.
  */
 class _WorkerStub implements _ManagerStub native "*Worker" {
-  get id => JS("Object", "#.id", this);
+  get id => JS("var", "#.id", this);
   void set id(i) { JS("void", "#.id = #", this, i); }
   void set onmessage(f) { JS("void", "#.onmessage = #", this, f); }
-  void postMessage(msg) => JS("Object", "#.postMessage(#)", this, msg);
+  void postMessage(msg) => JS("void", "#.postMessage(#)", this, msg);
   // terminate() is implemented by Worker.
   void terminate();
 }
 
 const String _SPAWNED_SIGNAL = "spawned";
 
 class _IsolateNatives {
 
   /**
    * The src url for the script tag that loaded this code. Used to create
    * JavaScript workers.
    */
   static String get _thisScript => JS("String", r"$thisScriptUrl");
 
   /** Starts a new worker with the given URL. */
-  static _WorkerStub _newWorker(url) => JS("Object", r"new Worker(#)", url);
+  static _WorkerStub _newWorker(url) => JS("_WorkerStub", r"new Worker(#)", url);
 
   /**
    * Assume that [e] is a browser message event and extract its message data.
    * We don't import the dom explicitly so, when workers are disabled, this
    * library can also run on top of nodejs.
    */
-  static _getEventData(e) => JS("Object", "#.data", e);
+  //static _getEventData(e) => JS("Object", "#.data", e);
+  static _getEventData(e) => JS("", "#.data", e);
 
   /**
    * Process messages on a worker, either to control the worker instance or to
    * pass messages along to the isolate running in the worker.
    */
   static void _processWorkerMessage(sender, e) {
     var msg = _deserializeMessage(_getEventData(e));
     switch (msg['command']) {
       case 'start':
         _globalState.currentManagerId = msg['id'];
@@ skipping 847 matching lines @@
       _window.clearTimeout(_handle);
     } else {
       _window.clearInterval(_handle);
     }
   }
 }
 
 Timer _timerFactory(int millis, void callback(Timer timer), bool repeating) =>
   repeating ? new _Timer.repeating(millis, callback)
             : new _Timer(millis, callback);