bindings: Supports inheritance of [Unforgeable] attributes as accessor-type properties.

Source/bindings/scripts/code_generator_v8.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 227 matching lines @@
             header_template_filename = 'partial_interface.h'
             cpp_template_filename = 'partial_interface.cpp'
             interface_name += 'Partial'
             assert component == 'core'
             component = 'modules'
             include_paths = interface_info.get('dependencies_other_component_include_paths')
         else:
             header_template_filename = 'interface.h'
             cpp_template_filename = 'interface.cpp'
             interface_context = v8_interface.interface_context
-        header_template = self.jinja_env.get_template(header_template_filename)
-        cpp_template = self.jinja_env.get_template(cpp_template_filename)
 
         template_context = interface_context(interface)
+        includes.update(interface_info.get('cpp_includes', {}).get(component, set()))
         if not interface.is_partial and not is_testing_target(full_path):
             template_context['header_includes'].add(self.info_provider.include_path_for_export)
             template_context['exported'] = self.info_provider.specifier_for_export
         # Add the include for interface itself
         if IdlType(interface_name).is_typed_array:
             template_context['header_includes'].add('core/dom/DOMTypedArray.h')
         elif interface_info['include_path']:
             template_context['header_includes'].add(interface_info['include_path'])
+
+        header_template = self.jinja_env.get_template(header_template_filename)
+        cpp_template = self.jinja_env.get_template(cpp_template_filename)
         header_text, cpp_text = render_template(
             include_paths, header_template, cpp_template, template_context,
             component)
         header_path, cpp_path = self.output_paths(interface_name)
         return (
             (header_path, header_text),
             (cpp_path, cpp_text),
         )
 
     def generate_dictionary_code(self, definitions, dictionary_name,
@@ skipping 186 matching lines @@
 
     # Create a dummy file as output for the build system,
     # since filenames of individual cache files are unpredictable and opaque
     # (they are hashes of the template path, which varies based on environment)
     with open(dummy_filename, 'w') as dummy_file:
         pass  # |open| creates or touches the file
 
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))