Use a class for CodeGeneratorV8

Source/bindings/scripts/unstable/interface_dependency_resolver.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 44 matching lines @@
 class InterfaceNotFoundError(Exception):
     """Raised if (partial) interface not found in target IDL file."""
     pass
 
 
 class InvalidPartialInterfaceError(Exception):
     """Raised if a file listed as a partial interface is not in fact so."""
     pass
 
 
-class InterfaceDependencyResolver:
+class InterfaceDependencyResolver(object):
     def __init__(self, interfaces_info, reader):
         """Initialize dependency resolver.
 
         Args:
             interfaces_info:
                 dict of interfaces information, from compute_dependencies.py
             reader:
                 IdlReader, used for reading dependency files
         """
         self.interfaces_info = interfaces_info
@@ skipping 94 matching lines @@
             'ImplementedAs', dependency_interface_basename))
 
     def merge_lists(source_list, target_list):
         for member in source_list:
             member.extended_attributes.update(merged_extended_attributes)
         target_list.extend(source_list)
 
     merge_lists(dependency_interface.attributes, target_interface.attributes)
     merge_lists(dependency_interface.constants, target_interface.constants)
     merge_lists(dependency_interface.operations, target_interface.operations)