Fix generating html_dart2js.dart and html_dartium.dart files.

lib/html/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
 import systembase
 from generator import *
 
 
 class NativeImplementationSystem(systembase.System):
 
-  def __init__(self, options, auxiliary_dir):
+  def __init__(self, options):
     super(NativeImplementationSystem, self).__init__(options)
-    self._auxiliary_dir = auxiliary_dir
     self._cpp_header_files = []
     self._cpp_impl_files = []
 
   def ImplementationGenerator(self, interface):
     return NativeImplementationGenerator(self, interface)
 
   def ProcessCallback(self, interface, info):
     self._interface = interface
 
     if IsPureInterface(self._interface.id):
@@ skipping 909 matching lines @@
     parent_interface = _FindInHierarchy(database, parent_interface, test)
     if parent_interface:
       return parent_interface
 
 def _ToWebKitName(name):
   name = name[0].lower() + name[1:]
   name = re.sub(r'^(hTML|uRL|jS|xML|xSLT)', lambda s: s.group(1).lower(),
                 name)
   return re.sub(r'^(create|exclusive)', lambda s: 'is' + s.group(1).capitalize(),
                 name)