Fix handling default parameters

tools/dom/scripts/databasebuilder.py

 #!/usr/bin/python
 # Copyright (c) 2011, 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.
 
 import copy
 import database
 import idlparser
 import logging
 import multiprocessing
@@ skipping 205 matching lines @@
   def _rename_types(self, idl_file, import_options):
     """Rename interface and type names with names provided in the
     options. Also clears scopes from scoped names"""
 
     strip_modules = lambda name: name.split('::')[-1]
 
     def rename_node(idl_node):
       idl_node.reset_id(strip_modules(idl_node.id))
 
     def rename_ext_attrs(ext_attrs_node):
-      for type_valued_attribute_name in ['Supplemental']:
+      for type_valued_attribute_name in ['DartSupplemental']:
         if type_valued_attribute_name in ext_attrs_node:
           value = ext_attrs_node[type_valued_attribute_name]
           if isinstance(value, str):
             ext_attrs_node[type_valued_attribute_name] = strip_modules(value)
 
     map(rename_node, idl_file.all(IDLInterface))
     map(rename_node, idl_file.all(IDLType))
     map(rename_ext_attrs, idl_file.all(IDLExtAttrs))
 
   def _annotate(self, interface, import_options):
@@ skipping 518 matching lines @@
       # TODO(antonm): Ideally we'd like to have pristine copy of WebKit IDLs and fetch
       # this information directly from it.  Unfortunately right now database is massaged
       # a lot so it's difficult to maintain necessary information on Window itself.
       interface = self._database.GetInterface(type)
       if 'V8EnabledPerContext' in attr.ext_attrs:
         interface.ext_attrs['synthesizedV8EnabledPerContext'] = \
             attr.ext_attrs['V8EnabledPerContext']
       if 'V8EnabledAtRuntime' in attr.ext_attrs:
         interface.ext_attrs['synthesizedV8EnabledAtRuntime'] = \
             attr.ext_attrs['V8EnabledAtRuntime'] or attr.id