Add a new bindings2/scripts directory for Dart bindings

sky/engine/bindings2/scripts/idl_validator.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 19 matching lines @@
 
 Design doc: http://www.chromium.org/developers/design-documents/idl-compiler#TOC-Extended-attribute-validation
 """
 
 
 import os.path
 import re
 
 module_path = os.path.dirname(__file__)
 source_path = os.path.join(module_path, os.pardir, os.pardir)
-EXTENDED_ATTRIBUTES_RELATIVE_PATH = os.path.join('bindings',
+EXTENDED_ATTRIBUTES_RELATIVE_PATH = os.path.join('bindings2',
                                                  'IDLExtendedAttributes.txt')
 EXTENDED_ATTRIBUTES_FILENAME = os.path.join(source_path,
                                             EXTENDED_ATTRIBUTES_RELATIVE_PATH)
 
 class IDLInvalidExtendedAttributeError(Exception):
     pass
 
 
 class IDLExtendedAttributeValidator(object):
     def __init__(self):
@@ skipping 50 matching lines @@
                 yield name, value_list
 
     valid_extended_attributes = {}
     for name, value_list in extended_attribute_name_values():
         if not value_list:
             valid_extended_attributes[name] = set([None])
             continue
         valid_extended_attributes[name] = set([value if value else None
                                                for value in value_list])
     return valid_extended_attributes