IDL: Add support for [Unscopeable] on attributes and methods

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 225 matching lines @@
 
     if constructors or custom_constructors or has_event_constructor or named_constructor:
         if interface.is_partial:
             raise Exception('[Constructor] and [NamedConstructor] MUST NOT be'
                             ' specified on partial interface definitions:'
                             '%s' % interface.name)
 
         includes.add('bindings/core/v8/V8ObjectConstructor.h')
         includes.add('core/frame/LocalDOMWindow.h')
 
+    # [Unscopeable] attributes and methods
+    unscopeables = []
+    for attribute in interface.attributes:
+        if 'Unscopeable' in attribute.extended_attributes:
+            unscopeables.append(attribute.name)
+    for method in interface.operations:
+        if 'Unscopeable' in method.extended_attributes:
+            unscopeables.append(method.name)
+
     context.update({
         'any_type_attributes': any_type_attributes,
         'constructors': constructors,
         'has_custom_constructor': bool(custom_constructors),
         'has_event_constructor': has_event_constructor,
         'interface_length':
             interface_length(interface, constructors + custom_constructors),
         'is_constructor_raises_exception': extended_attributes.get('RaisesException') == 'Constructor',  # [RaisesException=Constructor]
         'named_constructor': named_constructor,
+        'unscopeables': sorted(unscopeables),
     })
 
     constants = [constant_context(constant, interface) for constant in interface.constants]
 
     special_getter_constants = []
     runtime_enabled_constants = []
     constant_configuration_constants = []
 
     for constant in constants:
         if constant['measure_as'] or constant['deprecate_as']:
@@ skipping 1064 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),
     }