[bindings] support legacyiterable<> WebIDL syntax

third_party/WebKit/Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # 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
@@ skipping 335 matching lines @@
             argument.extended_attributes.update(extended_attributes)
         return argument
 
     # [Iterable], iterable<>, maplike<> and setlike<>
     iterator_method = None
     # FIXME: support Iterable in partial interfaces. However, we don't
     # need to support iterator overloads between interface and
     # partial interface definitions.
     # http://heycam.github.io/webidl/#idl-overloading
     if (not interface.is_partial
-        and (interface.iterable or interface.maplike or interface.setlike
+        and (interface.iterable or interface.legacyiterable or interface.maplike or interface.setlike
              or 'Iterable' in extended_attributes)):
 
         used_extended_attributes = {}
 
         if interface.iterable:
             used_extended_attributes.update(interface.iterable.extended_attributes)
+        elif interface.legacyiterable:
+            used_extended_attributes.update(interface.legacyiterable.extended_attributes)
         elif interface.maplike:
             used_extended_attributes.update(interface.maplike.extended_attributes)
         elif interface.setlike:
             used_extended_attributes.update(interface.setlike.extended_attributes)
 
         if 'RaisesException' in used_extended_attributes:
             raise ValueError('[RaisesException] is implied for iterable<>/maplike<>/setlike<>')
         if 'CallWith' in used_extended_attributes:
             raise ValueError('[CallWith=ScriptState] is implied for iterable<>/maplike<>/setlike<>')
 
@@ skipping 994 matching lines @@
 
     extended_attributes = deleter.extended_attributes
     idl_type = deleter.idl_type
     is_call_with_script_state = v8_utilities.has_extended_attribute_value(deleter, 'CallWith', 'ScriptState')
     return {
         'is_call_with_script_state': is_call_with_script_state,
         'is_custom': 'Custom' in extended_attributes,
         'is_raises_exception': 'RaisesException' in extended_attributes,
         'name': cpp_name(deleter),
     }