IDL compiler: delete Perl compiler, remove unstable/ directory

Source/bindings/scripts/idl_definitions_builder.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 20 matching lines @@
 import os
 
 from idl_definitions import IdlDefinitions, IdlInterface, IdlException, IdlOperation, IdlCallbackFunction, IdlArgument, IdlAttribute, IdlConstant, IdlEnum, IdlUnionType
 
 SPECIAL_KEYWORD_LIST = ['GETTER', 'SETTER', 'DELETER']
 STANDARD_TYPEDEFS = {
     # http://www.w3.org/TR/WebIDL/#common-DOMTimeStamp
     'DOMTimeStamp': 'unsigned long long',
 }
 
+
 def build_idl_definitions_from_ast(node):
     if node is None:
         return None
     node_class = node.GetClass()
     if node_class != 'File':
         raise ValueError('Unrecognized node class: %s' % node_class)
     return file_node_to_idl_definitions(node)
 
 
 def file_node_to_idl_definitions(node):
@@ skipping 458 matching lines @@
     sequence_type = type_node_to_type(sequence_child)
     return 'sequence<%s>' % sequence_type
 
 
 def union_type_node_to_idl_union_type(node):
     union_member_types = []
     for member_type_node in node.GetChildren():
         member_type = type_node_to_type(member_type_node)
         union_member_types.append(member_type)
     return IdlUnionType(union_member_types=union_member_types)