Got WebGLRenderingContextBase to work with the "implements" syntax

Source/bindings/scripts/compute_interfaces_info.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 145 matching lines @@
 
 
 def compute_individual_info(idl_filename):
     full_path = os.path.realpath(idl_filename)
     idl_file_contents = get_file_contents(full_path)
 
     extended_attributes = get_interface_extended_attributes_from_idl(idl_file_contents)
     implemented_as = extended_attributes.get('ImplementedAs')
     # FIXME: remove [NoHeader] once switch to Python
     this_include_path = (include_path(idl_filename, implemented_as)
-                         if ('ImplementedInBaseClass' not in extended_attributes
-                             and 'NoHeader' not in extended_attributes)
+                         if 'NoHeader' not in extended_attributes
                          else None)
 
     # Handle partial interfaces
     partial_interface_name = get_partial_interface_name_from_idl(idl_file_contents)
     if partial_interface_name:
         add_paths_to_partials_dict(partial_interface_name, full_path, this_include_path)
         return
 
     # If not a partial interface, the basename is the interface name
     interface_name, _ = os.path.splitext(os.path.basename(idl_filename))
@@ skipping 107 matching lines @@
     idl_files.extend(args)
 
     compute_interfaces_info(idl_files)
     write_pickle_file(options.interfaces_info_file,
                       interfaces_info,
                       options.write_file_only_if_changed)
 
 
 if __name__ == '__main__':
     sys.exit(main())