IDL: Generate union type containers

Source/bindings/modules/generated.gyp

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Generate IDL interfaces info for modules, used to generate bindings
 #
 # Design doc: http://www.chromium.org/developers/design-documents/idl-build
 
 {
   'includes': [
@@ skipping 180 matching lines @@
     'target_name': 'interfaces_info_individual_modules',
     'dependencies': [
       '<(bindings_scripts_dir)/scripts.gyp:cached_lex_yacc_tables',
       'modules_core_global_constructors_idls',
       'modules_global_constructors_idls',
     ],
     'variables': {
       'cache_directory': '<(bindings_modules_output_dir)/../scripts',
       'static_idl_files': '<(modules_static_idl_files)',
       'generated_idl_files': '<(modules_generated_idl_files)',
-      'output_file':
+      'interfaces_info_file':
         '<(bindings_modules_output_dir)/InterfacesInfoModulesIndividual.pickle',
+      'component_info_file':
+        '<(bindings_modules_output_dir)/ComponentInfoModules.pickle',
     },
     'includes': ['../../bindings/scripts/interfaces_info_individual.gypi'],
   },
 ################################################################################
   {
     # GN version: //third_party/WebKit/Source/bindings/modules:interfaces_info
     'target_name': 'interfaces_info',
     'dependencies': [
         '../core/generated.gyp:interfaces_info_individual_core',
         'interfaces_info_individual_modules',
     ],
     'variables': {
       'input_files': [
         '<(bindings_core_output_dir)/InterfacesInfoCoreIndividual.pickle',
         '<(bindings_modules_output_dir)/InterfacesInfoModulesIndividual.pickle',
       ],
       'output_file':
         '<(bindings_modules_output_dir)/InterfacesInfoModules.pickle',
     },
     'includes': ['../../bindings/scripts/interfaces_info_overall.gypi'],
   },
 ################################################################################
   ],  # targets
 }