Fix Windows build.

lib/dom/scripts/systemnative.py

 #!/usr/bin/python
 # 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.
 
 """This module provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 71 matching lines @@
                                      argument.id))
         arguments.append(argument_type_info.to_dart_conversion(argument.id))
         cpp_impl_includes |= set(argument_type_info.conversion_includes())
 
       native_return_type = GetIDLTypeInfo(operation.type.id).native_type()
       cpp_header_handlers_emitter.Emit(
           '\n'
           '    virtual $TYPE handleEvent($PARAMETERS);\n',
           TYPE=native_return_type, PARAMETERS=', '.join(parameters))
 
+      arguments_declaration = 'Dart_Handle arguments[] = { %s }' % ', '.join(arguments)
+      if not len(arguments):
+        arguments_declaration = 'Dart_Handle* arguments = 0'
       cpp_impl_handlers_emitter.Emit(
           '\n'
           '$TYPE $CLASS_NAME::handleEvent($PARAMETERS)\n'
           '{\n'
           '    if (!m_callback.isolate()->isAlive())\n'
           '        return$ERROR_RETURN;\n'
           '    DartIsolate::Scope scope(m_callback.isolate());\n'
           '    DartApiScope apiScope;\n'
-          '    Dart_Handle arguments[] = { $ARGUMENTS };\n'
+          '    $ARGUMENTS_DECLARATION;\n'
           '    $(RETURN_PREFIX)m_callback.handleEvent($ARGUMENT_COUNT, arguments);\n'
           '}\n',
           TYPE=native_return_type,
           CLASS_NAME=class_name,
           PARAMETERS=', '.join(parameters),
           ERROR_RETURN=error_return,
           RETURN_PREFIX=return_prefix,
-          ARGUMENTS=', '.join(arguments),
+          ARGUMENTS_DECLARATION=arguments_declaration,
           ARGUMENT_COUNT=len(arguments))
 
     cpp_header_path = self._FilePathForCppHeader(self._interface.id)
     cpp_header_emitter = self._emitters.FileEmitter(cpp_header_path)
     cpp_header_emitter.Emit(
         self._templates.Load('cpp_callback_header.template'),
         INTERFACE=self._interface.id,
         HANDLERS=cpp_header_handlers_emitter.Fragments())
 
     cpp_impl_path = self._FilePathForCppImplementation(self._interface.id)
@@ skipping 716 matching lines @@
 def _InstanceOfNode(database, interface):
   if interface.id == 'Node':
     return True
   for parent in interface.parents:
     if not database.HasInterface(parent.type.id):
       continue
     parent_interface = database.GetInterface(parent.type.id)
     if _InstanceOfNode(database, parent_interface):
       return True
   return False