Do not use overloaded toDartValue for primitive types.

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 52 matching lines @@
       return None
 
     cpp_impl_includes = set()
     cpp_header_handlers_emitter = emitter.Emitter()
     cpp_impl_handlers_emitter = emitter.Emitter()
     class_name = 'Dart%s' % self._interface.id
     for operation in interface.operations:
       if operation.type.id == 'void':
         return_type = 'void'
         return_prefix = ''
+        error_return = ''
       else:
         return_type = 'bool'
         return_prefix = 'return '
+        error_return = ' false'
 
       parameters = []
       arguments = []
       for argument in operation.arguments:
         argument_type_info = GetIDLTypeInfo(argument.type.id)
         parameters.append('%s %s' % (argument_type_info.parameter_type(),
                                      argument.id))
-        arguments.append(argument.id)
+        arguments.append(argument_type_info.to_dart_conversion(argument.id))
         cpp_impl_includes |= set(argument_type_info.conversion_includes())
 
       cpp_header_handlers_emitter.Emit(
           '\n'
           '    virtual $TYPE handleEvent($PARAMETERS);\n',
           TYPE=return_type, PARAMETERS=', '.join(parameters))
 
       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'
           '    $(RETURN_PREFIX)m_callback.handleEvent($ARGUMENTS);\n'
           '}\n',
           TYPE=return_type,
           CLASS_NAME=class_name,
           PARAMETERS=', '.join(parameters),
+          ERROR_RETURN=error_return,
           RETURN_PREFIX=return_prefix,
           ARGUMENTS=', '.join(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())
 
@@ skipping 717 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