Remove [InterfaceName] IDL attribute

Source/bindings/scripts/preprocess_idls.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 88 matching lines @@
             continue
         extended_attribute = attribute_name
         if attribute_value != 'VALUE_IS_MISSING':
             extended_attribute += '=' + attribute_value
         extended_attributes_list.append(extended_attribute)
     if extended_attributes_list:
         extended_string = '[%s] ' % ', '.join(extended_attributes_list)
     else:
         extended_string = ''
 
-    # FIXME: Remove this once we remove [InterfaceName] IDL attribute, http://crbug.com/242137
-    if 'InterfaceName' in extended_attributes:
-        extended_interface_name = extended_attributes['InterfaceName']
-    else:
-        extended_interface_name = interface_name
-    attribute_string = 'attribute %sConstructor %s' % (interface_name, extended_interface_name)
+    attribute_string = 'attribute %(interface_name)sConstructor %(interface_name)s' % {'interface_name': interface_name}
     attributes_list = [extended_string + attribute_string]
 
     # In addition to the regular property, for every [NamedConstructor]
     # extended attribute on an interface, a corresponding property MUST exist
     # on the ECMAScript global object.
     if 'NamedConstructor' in extended_attributes:
         named_constructor = extended_attributes['NamedConstructor']
         # Extract function name, namely everything before opening '('
         constructor_name = re.sub(r'\(.*', '', named_constructor)
         # Note the reduplicated 'ConstructorConstructor'
@@ skipping 93 matching lines @@
     idl_files = []
     with open(options.idl_files_list) as idl_files_list_file:
         for line in idl_files_list_file:
             idl_files.append(string.rstrip(line, '\n'))
     resolved_supplementals = parse_idl_files(idl_files, options.window_constructors_file, options.workercontext_constructors_file)
     write_dependency_file(options.supplemental_dependency_file, resolved_supplementals, only_if_changed=options.write_file_only_if_changed)
 
 
 if __name__ == '__main__':
     main()