Remove SendPortSync and ReceivePortSync.

tools/dom/src/Serialization.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.
 
 part of html;
 
 /********************************************************
   Inserted from lib/isolate/serialization.dart
@@ skipping 26 matching lines @@
       _visited.cleanup();
     }
     return result;
   }
 
   _dispatch(var x) {
     if (isPrimitive(x)) return visitPrimitive(x);
     if (x is List) return visitList(x);
     if (x is Map) return visitMap(x);
     if (x is SendPort) return visitSendPort(x);
-    if (x is SendPortSync) return visitSendPortSync(x);
 
     // Overridable fallback.
     return visitObject(x);
   }
 
   visitPrimitive(x);
   visitList(List x);
   visitMap(Map x);
   visitSendPort(SendPort x);
-  visitSendPortSync(SendPortSync x);
 
   visitObject(Object x) {
     // TODO(floitsch): make this a real exception. (which one)?
     throw "Message serialization: Illegal value $x passed";
   }
 
   static bool isPrimitive(x) {
     return (x == null) || (x is String) || (x is num) || (x is bool);
   }
 }
@@ skipping 103 matching lines @@
   }
 
   deserializeSendPort(List x);
 
   deserializeObject(List x) {
     // TODO(floitsch): Use real exception (which one?).
     throw "Unexpected serialized object";
   }
 }