Pass current value of attributes to WebDOMActivityLogger Setter logs.

Source/bindings/scripts/v8_attributes.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 75 matching lines @@
 
     if (base_idl_type == 'EventHandler' and
         interface.name in ['Window', 'WorkerGlobalScope'] and
         attribute.name == 'onerror'):
         includes.add('bindings/v8/V8ErrorHandler.h')
 
     contents = {
         'access_control_list': access_control_list(attribute),
         'activity_logging_world_list_for_getter': v8_utilities.activity_logging_world_list(attribute, 'Getter'),  # [ActivityLogging]
         'activity_logging_world_list_for_setter': v8_utilities.activity_logging_world_list(attribute, 'Setter'),  # [ActivityLogging]
+        'activity_logging_include_old_value_for_setter': 'LogPreviousValue' in extended_attributes,  # [ActivityLogging]
         'cached_attribute_validation_method': extended_attributes.get('CachedAttribute'),
         'conditional_string': v8_utilities.conditional_string(attribute),
         'constructor_type': idl_type.constructor_type_name
                             if is_constructor_attribute(attribute) else None,
         'cpp_name': cpp_name(attribute),
         'cpp_type': idl_type.cpp_type,
+        'cpp_value_to_v8_value': idl_type.cpp_value_to_v8_value(cpp_value='original', creation_context='info.Holder()'),
         'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
         'enum_validation_expression': idl_type.enum_validation_expression,
         'has_custom_getter': has_custom_getter,
         'has_custom_setter': has_custom_setter,
         'has_setter_exception_state':
             is_setter_raises_exception or has_type_checking_interface or
             has_type_checking_nullable or has_type_checking_unrestricted or
             idl_type.is_integer_type,
         'has_type_checking_interface': has_type_checking_interface,
         'has_type_checking_nullable': has_type_checking_nullable,
@@ skipping 307 matching lines @@
     lambda self: strip_suffix(self.base_type, 'Constructor'))
 
 
 def is_constructor_attribute(attribute):
     # FIXME: replace this with [ConstructorAttribute] extended attribute
     return attribute.idl_type.base_type.endswith('Constructor')
 
 
 def generate_constructor_getter(interface, attribute, contents):
     contents['needs_constructor_getter_callback'] = contents['measure_as'] or contents['deprecate_as']