Make SendPortImpl_internalSend not take a reply port as argument.

runtime/lib/isolate.cc

 // 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.
 
 #include "platform/assert.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 77 matching lines @@
 }
 
 
 DEFINE_NATIVE_ENTRY(RawReceivePortImpl_closeInternal, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(Smi, id, arguments->NativeArgAt(0));
   PortMap::ClosePort(id.Value());
   return Object::null();
 }
 
 
-DEFINE_NATIVE_ENTRY(SendPortImpl_sendInternal_, 3) {
+DEFINE_NATIVE_ENTRY(SendPortImpl_sendInternal_, 2) {
   GET_NON_NULL_NATIVE_ARGUMENT(Smi, send_id, arguments->NativeArgAt(0));
-  GET_NON_NULL_NATIVE_ARGUMENT(Smi, reply_id, arguments->NativeArgAt(1));
   // TODO(iposva): Allow for arbitrary messages to be sent.
-  GET_NON_NULL_NATIVE_ARGUMENT(Instance, obj, arguments->NativeArgAt(2));
+  GET_NON_NULL_NATIVE_ARGUMENT(Instance, obj, arguments->NativeArgAt(1));
 
   uint8_t* data = NULL;
   MessageWriter writer(&data, &allocator);
   writer.WriteMessage(obj);
 
   // TODO(turnidge): Throw an exception when the return value is false?
-  PortMap::PostMessage(new Message(send_id.Value(), reply_id.Value(),
+  PortMap::PostMessage(new Message(send_id.Value(), Message::kIllegalPort,
                                    data, writer.BytesWritten(),
                                    Message::kNormalPriority));
   return Object::null();
 }
 
 
 static void ThrowIsolateSpawnException(const String& message) {
   const Array& args = Array::Handle(Array::New(1));
   args.SetAt(0, message);
   Exceptions::ThrowByType(Exceptions::kIsolateSpawn, args);
@@ skipping 149 matching lines @@
 
   // The control port is being accessed as a regular port from Dart code. This
   // is most likely due to the _startIsolate code in dart:isolate. Account for
   // this by increasing the number of open control ports.
   isolate->message_handler()->increment_control_ports();
 
   return port.raw();
 }
 
 }  // namespace dart