IDL: reuse more code between CG for methods and constructors

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 219 matching lines @@
                 return '%s.get()' % argument.name
             return argument.name
         if (idl_type.is_callback_interface or
             idl_type.name in ['NodeFilter', 'XPathNSResolver']):
             # FIXME: remove this special case
             return '%s.release()' % argument.name
         return argument.name
 
     # Truncate omitted optional arguments
     arguments = method.arguments[:number_of_arguments]
-    cpp_arguments = v8_utilities.call_with_arguments(method)
+    cpp_arguments = []
+    if method.is_constructor:
+        call_with_values = interface.extended_attributes.get('ConstructorCallWith')
+    else:
+        call_with_values = method.extended_attributes.get('CallWith')
+    cpp_arguments.extend(v8_utilities.call_with_arguments(call_with_values))
     # 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 and method.idl_type.union_arguments
     if this_union_arguments:
         cpp_arguments.extend(this_union_arguments)
 
-    if 'RaisesException' in method.extended_attributes:
+    if ('RaisesException' in method.extended_attributes or
+        (method.is_constructor and
+         has_extended_attribute_value(interface, 'RaisesException', 'Constructor'))):
         cpp_arguments.append('exceptionState')
 
     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)
@@ skipping 67 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)