Make classes for union types exported.

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 315 matching lines @@
     def generate_code(self):
         union_types = self.info_provider.union_types
         if not union_types:
             return ()
         header_template = self.jinja_env.get_template('union.h')
         cpp_template = self.jinja_env.get_template('union.cpp')
         template_context = v8_union.union_context(
             union_types, self.info_provider.interfaces_info)
         template_context['code_generator'] = module_pyname
         capitalized_component = self.target_component.capitalize()
+        template_context['exported'] = self.info_provider.specifier_for_export
         template_context['header_filename'] = 'bindings/%s/v8/UnionTypes%s.h' % (
             self.target_component, capitalized_component)
         template_context['macro_guard'] = 'UnionType%s_h' % capitalized_component
+        additional_header_includes = [self.info_provider.include_path_for_export]
 
         # Add UnionTypesCore.h as a dependency when we generate modules union types
         # because we only generate union type containers which are used by both
         # core and modules in UnionTypesCore.h.
         # FIXME: This is an ad hoc workaround and we need a general way to
         # handle core <-> modules dependency.
         if self.target_component == 'modules':
-            template_context['header_includes'] = sorted(
-                template_context['header_includes'] +
-                ['bindings/core/v8/UnionTypesCore.h'])
+            additional_header_includes.append(
+                'bindings/core/v8/UnionTypesCore.h')
+
+        template_context['header_includes'] = sorted(
+            template_context['header_includes'] + additional_header_includes)
 
         header_text = header_template.render(template_context)
         cpp_text = cpp_template.render(template_context)
         header_path = posixpath.join(self.output_dir,
                                      'UnionTypes%s.h' % capitalized_component)
         cpp_path = posixpath.join(self.output_dir,
                                   'UnionTypes%s.cpp' % capitalized_component)
         return (
             (header_path, header_text),
             (cpp_path, cpp_text),
@@ skipping 79 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))