Update from https://crrev.com/320343

tools/idl_parser/idl_parser.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 """ Parser for PPAPI IDL """
 
 #
 # IDL Parser
 #
@@ skipping 246 matching lines @@
     p[0] = self.BuildNamed('Interface', p, 2, p[4])
 
   # [9]
   def p_InterfaceMembers(self, p):
     """InterfaceMembers : ExtendedAttributeList InterfaceMember InterfaceMembers
                         |"""
     if len(p) > 1:
       p[2].AddChildren(p[1])
       p[0] = ListFromConcat(p[2], p[3])
 
+  # [9.1] Error recovery for InterfaceMembers
+  def p_InterfaceMembersError(self, p):
+    """InterfaceMembers : error"""
+    p[0] = self.BuildError(p, 'InterfaceMembers')
+
   # [10] Removed unsupported: Serializer
   def p_InterfaceMember(self, p):
     """InterfaceMember : Const
                        | Operation
                        | Stringifier
                        | StaticMember
                        | Iterable
                        | ReadonlyMember
                        | ReadWriteAttribute
                        | ReadWriteMaplike
@@ skipping 926 matching lines @@
 
   print '\n'.join(ast.Tree(accept_props=['PROD']))
   if errors:
     print '\nFound %d errors.\n' % errors
 
   return errors
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))