IDL: Support [Unforgeable] on interface definitions

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 21 matching lines @@
 Extends IdlTypeBase and IdlUnionType with property |union_arguments|.
 
 Design doc: http://www.chromium.org/developers/design-documents/idl-compiler
 """
 
 from idl_definitions import IdlArgument, IdlOperation
 from idl_types import IdlTypeBase, IdlUnionType, inherits_interface
 from v8_globals import includes
 import v8_types
 import v8_utilities
-from v8_utilities import has_extended_attribute_value
+from v8_utilities import has_extended_attribute_value, is_unforgeable
 
 
 # Methods with any of these require custom method registration code in the
 # interface's configure*Template() function.
 CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES = frozenset([
     'DoNotCheckSecurity',
     'DoNotCheckSignature',
     'NotEnumerable',
     'Unforgeable',
 ])
@@ skipping 15 matching lines @@
     idl_type = method.idl_type
     is_static = method.is_static
     name = method.name
 
     idl_type.add_includes_for_type()
     this_cpp_value = cpp_value(interface, method, len(arguments))
 
     def function_template():
         if is_static:
             return 'functionTemplate'
-        if 'Unforgeable' in extended_attributes:
+        if is_unforgeable(interface, method):
             return 'instanceTemplate'
         return 'prototypeTemplate'
 
     is_implemented_in_private_script = 'ImplementedInPrivateScript' in extended_attributes
     if is_implemented_in_private_script:
         includes.add('bindings/core/v8/PrivateScriptRunner.h')
         includes.add('core/frame/LocalFrame.h')
         includes.add('platform/ScriptForbiddenScope.h')
 
     # [OnlyExposedToPrivateScript]
@@ skipping 35 matching lines @@
         'cpp_type': (v8_types.cpp_template_type('Nullable', idl_type.cpp_type)
                      if idl_type.is_explicit_nullable else idl_type.cpp_type),
         'cpp_value': this_cpp_value,
         'cpp_type_initializer': idl_type.cpp_type_initializer,
         'custom_registration_extended_attributes':
             CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES.intersection(
                 extended_attributes.iterkeys()),
         'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
         'exposed_test': v8_utilities.exposed(method, interface),  # [Exposed]
         'function_template': function_template(),
-        'has_custom_registration': is_static or
+        'has_custom_registration':
+            is_static or
+            is_unforgeable(interface, method) or
             v8_utilities.has_extended_attribute(
                 method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES),
         'has_exception_state':
             is_raises_exception or
             is_check_security_for_frame or
             is_check_security_for_window or
             any(argument for argument in arguments
                 if (argument.idl_type.name == 'SerializedScriptValue' or
                     argument_conversion_needs_exception_state(method, argument))),
         'idl_type': idl_type.base_type,
         'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'),
         'is_call_with_script_arguments': is_call_with_script_arguments,
         'is_call_with_script_state': is_call_with_script_state,
         'is_check_security_for_frame': is_check_security_for_frame,
         'is_check_security_for_node': is_check_security_for_node,
         'is_check_security_for_window': is_check_security_for_window,
         'is_custom': 'Custom' in extended_attributes,
         'is_custom_element_callbacks': is_custom_element_callbacks,
         'is_do_not_check_security': is_do_not_check_security,
         'is_do_not_check_signature': 'DoNotCheckSignature' in extended_attributes,
         'is_explicit_nullable': idl_type.is_explicit_nullable,
         'is_implemented_in_private_script': is_implemented_in_private_script,
         'is_partial_interface_member':
             'PartialInterfaceImplementedAs' in extended_attributes,
         'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
         'is_raises_exception': is_raises_exception,
-        'is_read_only': 'Unforgeable' in extended_attributes,
+        'is_read_only': is_unforgeable(interface, method),
         'is_static': is_static,
         'is_variadic': arguments and arguments[-1].is_variadic,
         'measure_as': v8_utilities.measure_as(method),  # [MeasureAs]
         'name': name,
         'number_of_arguments': len(arguments),
         'number_of_required_arguments': len([
             argument for argument in arguments
             if not (argument.is_optional or argument.is_variadic)]),
         'number_of_required_or_variadic_arguments': len([
             argument for argument in arguments
             if not argument.is_optional]),
         'only_exposed_to_private_script': is_only_exposed_to_private_script,
         'per_context_enabled_function': v8_utilities.per_context_enabled_function_name(method),  # [PerContextEnabled]
         'private_script_v8_value_to_local_cpp_value': idl_type.v8_value_to_local_cpp_value(
             extended_attributes, 'v8Value', 'cppValue', isolate='scriptState->isolate()', used_in_private_script=True),
-        'property_attributes': property_attributes(method),
+        'property_attributes': property_attributes(interface, method),
         'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(method),  # [RuntimeEnabled]
         'should_be_exposed_to_script': not (is_implemented_in_private_script and is_only_exposed_to_private_script),
         'signature': 'v8::Local<v8::Signature>()' if is_static or 'DoNotCheckSignature' in extended_attributes else 'defaultSignature',
         'use_output_parameter_for_result': idl_type.use_output_parameter_for_result,
         'use_local_result': use_local_result(method),
         'v8_set_return_value': v8_set_return_value(interface.name, method, this_cpp_value),
         'v8_set_return_value_for_main_world': v8_set_return_value(interface.name, method, this_cpp_value, for_main_world=True),
         'visible': is_visible,
         'world_suffixes': ['', 'ForMainWorld'] if 'PerWorldBindings' in extended_attributes else [''],  # [PerWorldBindings],
     }
@@ skipping 189 matching lines @@
                                                 name, index=index, declare_variable=False,
                                                 return_promise=return_promise,
                                                 restricted_float=restricted_float)
 
 
 ################################################################################
 # Auxiliary functions
 ################################################################################
 
 # [NotEnumerable]
-def property_attributes(method):
+def property_attributes(interface, method):
     extended_attributes = method.extended_attributes
     property_attributes_list = []
     if 'NotEnumerable' in extended_attributes:
         property_attributes_list.append('v8::DontEnum')
-    if 'Unforgeable' in extended_attributes:
+    if is_unforgeable(interface, method):
         property_attributes_list.append('v8::ReadOnly')
     if property_attributes_list:
         property_attributes_list.insert(0, 'v8::DontDelete')
     return property_attributes_list
 
 
 def argument_set_default_value(argument):
     idl_type = argument.idl_type
     default_value = argument.default_value
     if not default_value:
@@ skipping 43 matching lines @@
 
 IdlOperation.returns_promise = property(method_returns_promise)
 
 
 def argument_conversion_needs_exception_state(method, argument):
     idl_type = argument.idl_type
     return (idl_type.v8_conversion_needs_exception_state or
             argument.is_variadic or
             (method.returns_promise and (idl_type.is_string_type or
                                          idl_type.is_enum)))