Fixing an issue where optional parameters were having their types dropped.

sdk/lib/html/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 383 matching lines @@
         '    }\n',
         OPT_PARAM_NAME=self.param_infos[index].name,
         FACTORY=factory_provider,
         CTOR_FACTORY_NAME=factory_name,
         FACTORY_PARAMS=self.ParametersAsArgumentList(index))
 
     for index, param_info in enumerate(self.param_infos):
       if param_info.is_optional:
         EmitOptionalParameterInvocation(index)
 
-
-  def CopyAndWidenDefaultParameters(self):
-    """Returns equivalent OperationInfo, but default parameters are dynamic."""
-    info = copy.copy(self)
-    info.param_infos = [param.Copy() for param in self.param_infos]
-    for param in info.param_infos:
-      if param.is_optional:
-        param.type_id = None
-    return info
-
-
 def ConstantOutputOrder(a, b):
   """Canonical output ordering for constants."""
   if a.id < b.id: return -1
   if a.id > b.id: return 1
   return 0
 
 
 def _FormatNameList(names):
   """Returns JavaScript array literal expression with one name per line."""
   #names = sorted(names)
@@ skipping 670 matching lines @@
       else:
         dart_interface_name = type_name
       return InterfaceIDLTypeInfo(type_name, type_data, dart_interface_name,
                                   self)
 
     if type_data.clazz == 'SVGTearOff':
       return SVGTearOffIDLTypeInfo(type_name, type_data, self)
 
     class_name = '%sIDLTypeInfo' % type_data.clazz
     return globals()[class_name](type_name, type_data)