IDL: Fix union type support in cross-component partial interfaces

Source/bindings/scripts/compute_interfaces_info_individual.py

 #!/usr/bin/python
 #
 # 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.
@@ skipping 150 matching lines @@
     def __init__(self, cache_directory=None):
         self.reader = IdlReader(interfaces_info=None, outputdir=cache_directory)
         self.interfaces_info = {}
         self.partial_interface_files = defaultdict(lambda: {
             'full_paths': [],
             'include_paths': [],
         })
         self.union_types = set()
 
     def add_paths_to_partials_dict(self, partial_interface_name, full_path,
-                                   this_include_path=None):
+                                   include_paths):
         paths_dict = self.partial_interface_files[partial_interface_name]
         paths_dict['full_paths'].append(full_path)
-        if this_include_path:
-            paths_dict['include_paths'].append(this_include_path)
+        paths_dict['include_paths'].extend(include_paths)
 
     def collect_info(self, idl_filename):
         """Reads an idl file and collects information which is required by the
         binding code generation."""
         definitions = self.reader.read_idl_file(idl_filename)
         if definitions.interfaces:
             definition = next(definitions.interfaces.itervalues())
             interface_info = {
                 'is_callback_interface': definition.is_callback,
                 'is_dictionary': False,
@@ skipping 19 matching lines @@
         this_union_types = collect_union_types_from_definitions(definitions)
         self.union_types.update(this_union_types)
 
         extended_attributes = definition.extended_attributes
         implemented_as = extended_attributes.get('ImplementedAs')
         full_path = os.path.realpath(idl_filename)
         this_include_path = None if 'NoImplHeader' in extended_attributes else include_path(idl_filename, implemented_as)
         if definition.is_partial:
             # We don't create interface_info for partial interfaces, but
             # adds paths to another dict.
-            self.add_paths_to_partials_dict(definition.name, full_path, this_include_path)
+            partial_include_paths = []
+            if this_include_path:
+                partial_include_paths.append(this_include_path)
+            if this_union_types:
+                component = idl_filename_to_component(idl_filename)
+                partial_include_paths.append(
+                    'bindings/%s/v8/UnionTypes%s.h' % (component, component.capitalize()))
+            self.add_paths_to_partials_dict(definition.name, full_path, partial_include_paths)
             return
 
         # 'implements' statements can be included in either the file for the
         # implement*ing* interface (lhs of 'implements') or implement*ed* interface
         # (rhs of 'implements'). Store both for now, then merge to implement*ing*
         # interface later.
         left_interfaces, right_interfaces = get_implements_from_definitions(
             definitions, definition.name)
 
         interface_info.update({
@@ skipping 50 matching lines @@
 
     write_pickle_file(options.interfaces_info_file,
                       info_collector.get_info_as_dict(),
                       options.write_file_only_if_changed)
     write_pickle_file(options.component_info_file,
                       info_collector.get_component_info_as_dict(),
                       options.write_file_only_if_changed)
 
 if __name__ == '__main__':
     sys.exit(main())