Fix typo in code_generator_v8.py error message

third_party/WebKit/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 310 matching lines @@
 
     def output_paths(self, definition_name, interface_info):
         output_dir = posixpath.join(self.output_dir,
                                     interface_info['relative_dir'])
         header_path = posixpath.join(output_dir, '%s.h' % definition_name)
         cpp_path = posixpath.join(output_dir, '%s.cpp' % definition_name)
         return header_path, cpp_path
 
     def generate_code_internal(self, definitions, definition_name):
         if not definition_name in definitions.dictionaries:
-            raise ValueError('%s is not an IDL dictionary')
+            raise ValueError('%s is not an IDL dictionary' % definition_name)
         interfaces_info = self.info_provider.interfaces_info
         dictionary = definitions.dictionaries[definition_name]
         interface_info = interfaces_info[definition_name]
         header_template = self.jinja_env.get_template('dictionary_impl.h')
         cpp_template = self.jinja_env.get_template('dictionary_impl.cpp')
         template_context = v8_dictionary.dictionary_impl_context(
             dictionary, interfaces_info)
         include_paths = interface_info.get('dependencies_include_paths')
         if not is_testing_target(interface_info.get('full_path')):
             template_context['exported'] = self.info_provider.specifier_for_export
@@ skipping 137 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))