Support WebIDL's ExtendedAttributeIdentList in the Blink parser

Source/bindings/scripts/compute_global_objects.py

 #!/usr/bin/python
 #
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Compute global objects.
 
 Global objects are defined by interfaces with [Global] or [PrimaryGlobal] on
 their definition: http://heycam.github.io/webidl/#Global
@@ skipping 55 matching lines @@
         extended_attributes.iterkeys())
     if not global_keys:
         return
     if len(global_keys) > 1:
         raise ValueError('The [Global] and [PrimaryGlobal] extended attributes '
                          'MUST NOT be declared on the same interface.')
     global_key = next(iter(global_keys))
 
     global_value = extended_attributes[global_key]
     if global_value:
-        # FIXME: In spec names are comma-separated, which makes parsing very
-        # difficult (https://www.w3.org/Bugs/Public/show_bug.cgi?id=24959).
-        return global_value.split('&')
+        return global_value.strip('()').split(',')
     return [interface_name]
 
 
 def idl_files_to_interface_name_global_names(idl_files):
     """Yields pairs (interface_name, global_names) found in IDL files."""
     for idl_filename in idl_files:
         interface_name = idl_filename_to_interface_name(idl_filename)
         global_names = idl_file_to_global_names(idl_filename)
         if global_names:
             yield interface_name, global_names
@@ skipping 15 matching lines @@
     interface_name_global_names.update(
             idl_files_to_interface_name_global_names(idl_files))
 
     write_pickle_file(output_global_objects_filename,
                       interface_name_global_names,
                       options.write_file_only_if_changed)
 
 
 if __name__ == '__main__':
     sys.exit(main())