Fix dom generation after renamer refactoring.

lib/dom/scripts/generator.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 systems to generate
 Dart APIs from the IDL database."""
 
 import copy
 import re
@@ skipping 811 matching lines @@
 
   def TypeInfo(self, type_name):
     if not type_name in self._cache:
       self._cache[type_name] = self._TypeInfo(type_name)
     return self._cache[type_name]
 
   def DartType(self, type_name):
     dart_type = self.TypeInfo(type_name).dart_type()
     if self._database.HasInterface(dart_type):
       interface = self._database.GetInterface(dart_type)
-      return self._renamer.RenameInterface(interface)
+      if self._renamer:
+        return self._renamer.RenameInterface(interface)
+      else:
+        return interface.id
     return dart_type
 
   def _TypeInfo(self, type_name):
     match = re.match(r'(?:sequence<(\w+)>|(\w+)\[\])$', type_name)
     if match:
       if type_name == 'DOMString[]':
         return DOMStringArrayTypeInfo(self.TypeInfo('DOMString'))
       return SequenceIDLTypeInfo(type_name, self.TypeInfo(match.group(1) or match.group(2)))
     if not type_name in _idl_type_registry:
       return InterfaceIDLTypeInfo(type_name, TypeData('Interface'))
     type_data = _idl_type_registry.get(type_name)
     class_name = '%sIDLTypeInfo' % type_data.clazz
     return globals()[class_name](type_name, type_data)