Introduce TypeRegistry class.

lib/dom/scripts/systeminterface.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 providesfunctionality for systems to generate
 Dart interfaces from the IDL database."""
 
 import os
 import systembase
 from generator import *
 
 class InterfacesSystem(systembase.System):
 
-  def __init__(self, templates, database, emitters, output_dir):
-    super(InterfacesSystem, self).__init__(
-        templates, database, emitters, output_dir)
+  def __init__(self, options):
+    super(InterfacesSystem, self).__init__(options)
     self._dart_interface_file_paths = []
 
 
   def ProcessInterface(self, interface):
     """."""
     interface_name = interface.id
     dart_interface_file_path = self._FilePathForDartInterface(interface_name)
 
     self._dart_interface_file_paths.append(dart_interface_file_path)
 
@@ skipping 164 matching lines @@
     """
     Arguments:
       operations - contains the overloads, one or more operations with the same
         name.
     """
     self._members_emitter.Emit('\n'
                                '  $TYPE $NAME($PARAMS);\n',
                                TYPE=info.type_name,
                                NAME=info.name,
                                PARAMS=info.ParametersInterfaceDeclaration())