[bindings] partial interfaces should not violate componentization

Source/bindings/scripts/idl_definitions.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 257 matching lines @@
 class IdlInterface(object):
     def __init__(self, idl_name, node=None):
         self.attributes = []
         self.constants = []
         self.constructors = []
         self.custom_constructors = []
         self.extended_attributes = {}
         self.operations = []
         self.parent = None
         self.stringifier = None
+        self.original_interface = None

[haraken, 2014/10/09 04:24:00]

Is "original interface" a term of Web IDL? I'm not sure of the best name.
original interface, base interface, dependent_interface, etc.

I'm fine with "original interface" if Web IDL doesn't have a speced term.

[tasak, 2014/10/10 07:52:22]

I could not find any special term in WebIDL spec. However, I found:

Note
A partial interface definition cannot specify that the interface inherits from
another interface. Inheritance must be specified on the original interface 
definition.

or

4.3.5 Exposed
...
- partial interface
  The exposure set of the partial interface is the exposure set of the original
interface definition.

http://heycam.github.io/webidl/

So I think, we can use "original".

+        self.partial_interfaces = []
         if not node:  # Early exit for IdlException.__init__
             return
 
         self.is_callback = node.GetProperty('CALLBACK') or False
         self.is_exception = False
         # FIXME: uppercase 'Partial' => 'PARTIAL' in base IDL parser
         self.is_partial = node.GetProperty('Partial') or False
         self.idl_name = idl_name
         self.name = node.GetName()
 
@@ skipping 527 matching lines @@
     child_class = child.GetClass()
     if child_class != 'Type':
         raise ValueError('Unrecognized node class: %s' % child_class)
     return type_node_to_type(child)
 
 
 def union_type_node_to_idl_union_type(node):
     member_types = [type_node_to_type(member_type_node)
                     for member_type_node in node.GetChildren()]
     return IdlUnionType(member_types)