IDL: reuse more code between CG for methods and constructors

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 194 matching lines @@
         'v8_set_return_value_for_main_world': v8_set_return_value_statement(for_main_world=True),
         'v8_set_return_value': v8_set_return_value_statement(),
     })
 
 
 def getter_expression(interface, attribute, contents):
     arguments = []
     this_getter_base_name = getter_base_name(interface, attribute, arguments)
     getter_name = scoped_name(interface, attribute, this_getter_base_name)
 
-    arguments.extend(v8_utilities.call_with_arguments(attribute))
+    arguments.extend(v8_utilities.call_with_arguments(
+        attribute.extended_attributes.get('CallWith')))
     # Members of IDL partial interface definitions are implemented in C++ as
     # static member functions, which for instance members (non-static members)
     # take *impl as their first argument
     if ('PartialInterfaceImplementedAs' in attribute.extended_attributes and
         not attribute.is_static):
         arguments.append('*impl')
     if attribute.idl_type.is_nullable and not contents['has_type_checking_nullable']:
         arguments.append('isNull')
     if contents['is_getter_raises_exception']:
         arguments.append('exceptionState')
@@ skipping 74 matching lines @@
         attribute = target_attribute()
 
     contents.update({
         'cpp_setter': setter_expression(interface, attribute, contents),
         'v8_value_to_local_cpp_value': attribute.idl_type.v8_value_to_local_cpp_value(extended_attributes, 'v8Value', 'cppValue'),
     })
 
 
 def setter_expression(interface, attribute, contents):
     extended_attributes = attribute.extended_attributes
-    arguments = v8_utilities.call_with_arguments(attribute, extended_attributes.get('SetterCallWith'))
+    arguments = v8_utilities.call_with_arguments(
+        extended_attributes.get('SetterCallWith') or
+        extended_attributes.get('CallWith'))
 
     this_setter_base_name = setter_base_name(interface, attribute, arguments)
     setter_name = scoped_name(interface, attribute, this_setter_base_name)
 
     # Members of IDL partial interface definitions are implemented in C++ as
     # static member functions, which for instance members (non-static members)
     # take *impl as their first argument
     if ('PartialInterfaceImplementedAs' in extended_attributes and
         not attribute.is_static):
         arguments.append('*impl')
@@ skipping 101 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']