bindings: Ignores the last undefined arguments when counting the args.

third_party/WebKit/Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # 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
@@ skipping 1202 matching lines @@
 ################################################################################
 # Constructors
 ################################################################################
 
 # [Constructor]
 def constructor_context(interface, constructor):
     # [RaisesException=Constructor]
     is_constructor_raises_exception = \
         interface.extended_attributes.get('RaisesException') == 'Constructor'
 
+    argument_contexts = [
+        v8_methods.argument_context(interface, constructor, argument, index)
+        for index, argument in enumerate(constructor.arguments)]
+
     return {
-        'arguments': [v8_methods.argument_context(interface, constructor, argument, index)
-                      for index, argument in enumerate(constructor.arguments)],
+        'arguments': argument_contexts,
         'cpp_type': cpp_template_type(
             cpp_ptr_type('RefPtr', 'RawPtr', gc_type(interface)),
             cpp_name(interface)),
         'cpp_value': v8_methods.cpp_value(
             interface, constructor, len(constructor.arguments)),
         'has_exception_state':
             is_constructor_raises_exception or
             any(argument for argument in constructor.arguments
                 if argument.idl_type.name == 'SerializedScriptValue' or
                    argument.idl_type.v8_conversion_needs_exception_state),
+        'has_optional_argument_without_default_value':
+            any(True for argument_context in argument_contexts
+                if argument_context['is_optional_without_default_value']),
         'is_call_with_document':
             # [ConstructorCallWith=Document]
             has_extended_attribute_value(interface,
                 'ConstructorCallWith', 'Document'),
         'is_call_with_execution_context':
             # [ConstructorCallWith=ExecutionContext]
             has_extended_attribute_value(interface,
                 'ConstructorCallWith', 'ExecutionContext'),
         'is_call_with_script_state':
             # [ConstructorCallWith=ScriptState]
@@ skipping 135 matching lines @@
 
     extended_attributes = deleter.extended_attributes
     idl_type = deleter.idl_type
     is_call_with_script_state = v8_utilities.has_extended_attribute_value(deleter, 'CallWith', 'ScriptState')
     return {
         'is_call_with_script_state': is_call_with_script_state,
         'is_custom': 'Custom' in extended_attributes,
         'is_raises_exception': 'RaisesException' in extended_attributes,
         'name': cpp_name(deleter),
     }