Fix generating html_dart2js.dart and html_dartium.dart files.

lib/html/scripts/systembase.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 base functionality for systems to generate
 Dart APIs from the IDL database."""
 
 import os
 from generator import *
@@ skipping 13 matching lines @@
   - Finish
   """
 
   def __init__(self, options):
     self._templates = options.templates
     self._database = options.database
     self._emitters = options.emitters
     self._type_registry = options.type_registry
     self._renamer = options.renamer
     self._output_dir = options.output_dir
+    self._auxiliary_dir = options.auxiliary_dir
 
   def ProcessInterface(self, interface):
     """Processes an interface that is not a callback function."""
     pass
 
   def ProcessCallback(self, interface, info):
     """Processes an interface that is a callback function."""
     pass
 
   def GenerateLibraries(self, lib_dir):
@@ skipping 166 matching lines @@
       else:
         walk(interface.parents[1:])
     return result
 
   def _DartType(self, type_name):
     return self._system._type_registry.DartType(type_name)
 
 
 class GeneratorOptions(object):
   def __init__(self, templates, database, emitters, type_registry, renamer,
-               output_dir):
+               output_dir, auxiliary_dir):
     self.templates = templates
     self.database = database
     self.emitters = emitters
     self.type_registry = type_registry
     self.renamer = renamer
     self.output_dir = output_dir
+    self.auxiliary_dir = auxiliary_dir
 
 
 def IsReadOnly(attribute):
   return attribute.is_read_only or 'Replaceable' in attribute.ext_attrs