Refactor, rename, and generally rationalize code in the Frog isolates library,

lib/isolate/frog/ports.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.
 
 /** Common functionality to all send ports. */
 class _BaseSendPort implements SendPort {
   /** Id for the destination isolate. */
   final int _isolateId;
 
   _BaseSendPort(this._isolateId);
@@ skipping 74 matching lines @@
     });
   }
 
   bool operator ==(var other) => (other is _NativeJsSendPort) &&
       (_receivePort == other._receivePort);
 
   int hashCode() => _receivePort._id;
 }
 
 /** A send port that delivers messages via worker.postMessage. */
+// TODO(eub): abstract this for iframes.
 class _WorkerSendPort extends _BaseSendPort implements SendPort {
   final int _workerId;
   final int _receivePortId;
 
   const _WorkerSendPort(this._workerId, int isolateId, this._receivePortId)
       : super(isolateId);
 
   void send(var message, [SendPort replyTo = null]) {
     _waitForPendingPorts([message, replyTo], () {
       checkReplyTo(replyTo);
       final workerMessage = _serializeMessage({
           'command': 'message',
           'port': this,
           'msg': message,
           'replyTo': replyTo});
 
       if (_globalState.isWorker) {
         // communication from one worker to another go through the main worker:
-        _globalState.mainWorker.postMessage(workerMessage);
+        _globalState.mainManager.postMessage(workerMessage);
       } else {
-        _globalState.workers[_workerId].postMessage(workerMessage);
+        _globalState.managers[_workerId].postMessage(workerMessage);
       }
     });
   }
 
   bool operator ==(var other) {
     return (other is _WorkerSendPort) &&
         (_workerId == other._workerId) &&
         (_isolateId == other._isolateId) &&
         (_receivePortId == other._receivePortId);
   }
@@ skipping 149 matching lines @@
     // map.getValues().forEach(_dispatch);
     map.getValues().forEach((e) => _dispatch(e));
   }
 
   visitBufferingSendPort(_BufferingSendPort port) {
     if (port._port == null) {
       ports.add(port._futurePort);
     }
   }
 }