Add [DoNotGenerateClassBindings] extended attribute

Source/bindings/scripts/v8_callback_interface.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 67 matching lines @@
     includes.clear()
     includes.update(CALLBACK_INTERFACE_CPP_INCLUDES)
     name = callback_interface.name
 
     methods = [generate_method(operation)
                for operation in callback_interface.operations]
     template_contents = {
         'conditional_string': v8_utilities.conditional_string(callback_interface),
         'cpp_class': name,
         'v8_class': v8_utilities.v8_class_name(callback_interface),
+        'has_class_bindings': True,
         'header_includes': set(CALLBACK_INTERFACE_H_INCLUDES),
         'methods': methods,
     }
     return template_contents
 
 
 def add_includes_for_operation(operation):
     v8_types.add_includes_for_type(operation.idl_type)
     for argument in operation.arguments:
         v8_types.add_includes_for_type(argument.idl_type)
@@ skipping 30 matching lines @@
     argument_declarations = [
             '%s %s' % (cpp_type(argument.idl_type), argument.name)
             for argument in arguments]
     if call_with_this_handle:
         argument_declarations.insert(0, 'ScriptValue thisValue')
     return  {
         'argument_declarations': argument_declarations,
         'arguments': [generate_argument(argument) for argument in arguments],
         'handles': ['%sHandle' % argument.name for argument in arguments],
     }