More native binding match up fixes

tools/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 547 matching lines @@
         '}\n',
         INTERFACE_NAME=self._interface.id);
 
   def _EmitConstructorInfrastructure(self,
       constructor_info, cpp_prefix, cpp_suffix, factory_method_name,
       arguments=None, emit_to_native=False):
 
     constructor_callback_cpp_name = cpp_prefix + cpp_suffix
 
     if arguments is None:
-      argument_count = len(constructor_info.param_infos)
+        if self._dart_use_blink:
+            arguments = constructor_info.idl_args[0]
+            argument_count = len(arguments)
+        else:
+            argument_count = len(constructor_info.param_infos)
     else:
       argument_count = len(arguments)
 
     typed_formals = constructor_info.ParametersAsArgumentList(argument_count)
     parameters = constructor_info.ParametersAsStringOfVariables(argument_count)
     interface_name =  self._interface_type_info.interface_name()
 
-    if self._dart_use_blink and arguments:
+    if self._dart_use_blink:
         type_ids = [p.type.id for p in arguments]
         constructor_callback_id = \
             DeriveResolverString(self._interface.id,
                                  cpp_suffix, None,
                                  argument_count, type_ids)
     else:
         constructor_callback_id = self._interface.id + '_' + constructor_callback_cpp_name
 
     if self._dart_use_blink:
         # First we emit the toplevel function
@@ skipping 1347 matching lines @@
     e.Emit("};\n");
     e.Emit('\n');
     e.Emit('} // namespace WebCore\n');
 
 def _IsOptionalStringArgumentInInitEventMethod(interface, operation, argument):
   return (
       interface.id.endswith('Event') and
       operation.id.startswith('init') and
       argument.ext_attrs.get('Default') == 'Undefined' and
       argument.type.id == 'DOMString')