idl_parser: Add support for the record<K, V> WebIDL type.

third_party/WebKit/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 997 matching lines @@
         return array_type
 
     return base_type
 
 
 def type_node_inner_to_type(node):
     node_class = node.GetClass()
     # Note Type*r*ef, not Typedef, meaning the type is an identifier, thus
     # either a typedef shorthand (but not a Typedef declaration itself) or an
     # interface type. We do not distinguish these, and just use the type name.
-    if node_class in ['PrimitiveType', 'Typeref']:
+    if node_class in ['PrimitiveType', 'StringType', 'Typeref']:
         # unrestricted syntax: unrestricted double | unrestricted float
         is_unrestricted = bool(node.GetProperty('UNRESTRICTED'))
         return IdlType(node.GetName(), is_unrestricted=is_unrestricted)
     elif node_class == 'Any':
         return IdlType('any')
     elif node_class in ['Sequence', 'FrozenArray']:
         return sequence_node_to_type(node)
     elif node_class == 'UnionType':
         return union_type_node_to_idl_union_type(node)
     elif node_class == 'Promise':
@@ skipping 86 matching lines @@
         self.visit_typed_object(argument)
 
     def visit_iterable(self, iterable):
         self.visit_typed_object(iterable)
 
     def visit_maplike(self, maplike):
         self.visit_typed_object(maplike)
 
     def visit_setlike(self, setlike):
         self.visit_typed_object(setlike)