Adds a special case for sending an int over a port with the native API.

runtime/vm/native_api_impl.cc

 // Copyright (c) 2013, 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 "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_message.h"
 #include "vm/dart_api_state.h"
@@ skipping 38 matching lines @@
   bool success = writer.WriteCMessage(message);
 
   if (!success) return success;
 
   // Post the message at the given port.
   return PortMap::PostMessage(new Message(
       port_id, buffer, writer.BytesWritten(), Message::kNormalPriority));
 }
 
 
+DART_EXPORT bool Dart_PostInteger(Dart_Port port_id, intptr_t message) {
+  if (!Smi::IsValid(message)) {
+    return false;
+  }
+  Message* msg = new Message(port_id, message, Message::kNormalPriority);
+
+  // Post the message at the given port.
+  return PortMap::PostMessage(msg);
+}
+
+
 DART_EXPORT Dart_Port Dart_NewNativePort(const char* name,
                                          Dart_NativeMessageHandler handler,
                                          bool handle_concurrently) {
   if (name == NULL) {
     name = "<UnnamedNativePort>";
   }
   if (handler == NULL) {
     OS::PrintErr("%s expects argument 'handler' to be non-null.\n",
                  CURRENT_FUNC);
     return ILLEGAL_PORT;
@@ skipping 35 matching lines @@
   Dart_Handle result = Api::CheckAndFinalizePendingClasses(T);
   if (::Dart_IsError(result)) {
     return result;
   }
   CHECK_CALLBACK_STATE(T);
   CompileAll(T, &result);
   return result;
 }
 
 }  // namespace dart