Support optional, non-defaulted constructor arguments.

Source/bindings/scripts/v8_methods.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 139 matching lines @@
     this_cpp_value = cpp_value(interface, method, index)
     is_variadic_wrapper_type = argument.is_variadic and idl_type.is_wrapper_type
     return {
         'cpp_type': idl_type.cpp_type_args(used_in_cpp_sequence=is_variadic_wrapper_type),
         'cpp_value': this_cpp_value,
         'enum_validation_expression': idl_type.enum_validation_expression,
         'has_default': 'Default' in extended_attributes,
         'has_event_listener_argument': any(
             argument_so_far for argument_so_far in method.arguments[:index]
             if argument_so_far.idl_type.name == 'EventListener'),
-        'idl_type_object': idl_type,
         # Dictionary is special-cased, but arrays and sequences shouldn't be
         'idl_type': not idl_type.array_or_sequence_type and idl_type.base_type,
+        'idl_type_object': idl_type,
         'index': index,
         'is_clamp': 'Clamp' in extended_attributes,
         'is_callback_interface': idl_type.is_callback_interface,
         'is_nullable': idl_type.is_nullable,
         'is_optional': argument.is_optional,
         'is_strict_type_checking': 'StrictTypeChecking' in extended_attributes,
         'is_variadic_wrapper_type': is_variadic_wrapper_type,
         'vector_type': v8_types.cpp_ptr_type('Vector', 'HeapVector', idl_type.garbage_collection_type),
         'is_wrapper_type': idl_type.is_wrapper_type,
         'name': argument.name,
@@ skipping 26 matching lines @@
     # Truncate omitted optional arguments
     arguments = method.arguments[:number_of_arguments]
     cpp_arguments = v8_utilities.call_with_arguments(method)
     # 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 method.extended_attributes and
         not method.is_static):
         cpp_arguments.append('*impl')
     cpp_arguments.extend(cpp_argument(argument) for argument in arguments)
-    this_union_arguments = method.idl_type.union_arguments
+    this_union_arguments = method.idl_type and method.idl_type.union_arguments
     if this_union_arguments:
         cpp_arguments.extend(this_union_arguments)
 
     if 'RaisesException' in method.extended_attributes:
         cpp_arguments.append('exceptionState')
 
-    cpp_method_name = v8_utilities.scoped_name(interface, method, v8_utilities.cpp_name(method))
+    if method.name == 'Constructor':
+        base_name = 'create'
+    elif method.name == 'NamedConstructor':
+        base_name = 'createForJSConstructor'
+    else:
+        base_name = v8_utilities.cpp_name(method)
+
+    cpp_method_name = v8_utilities.scoped_name(interface, method, base_name)
     return '%s(%s)' % (cpp_method_name, ', '.join(cpp_arguments))
 
 
 def v8_set_return_value(interface_name, method, cpp_value, for_main_world=False):
     idl_type = method.idl_type
     extended_attributes = method.extended_attributes
     if idl_type.name == 'void':
         return None
 
     release = False
@@ skipping 45 matching lines @@
 
 
 def union_arguments(idl_type):
     """Return list of ['result0Enabled', 'result0', 'result1Enabled', ...] for union types, for use in setting return value"""
     return [arg
             for i in range(len(idl_type.member_types))
             for arg in ['result%sEnabled' % i, 'result%s' % i]]
 
 IdlType.union_arguments = property(lambda self: None)
 IdlUnionType.union_arguments = property(union_arguments)