Update from https://crrev.com/308996

tools/idl_parser/idl_ppapi_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 222 matching lines @@
     pass
 
   def p_null(self, p):
     """ """
     pass
 
   def p_PromiseType(self, p):
     """ """
     pass
 
+  def p_EnumValueListComma(self, p):
+    """ """
+    pass
+
+  def p_EnumValueListString(self, p):
+    """ """
+    pass
+
   # We only support:
   #    [ identifier ]
   #    [ identifier ( ArgumentList )]
   #    [ identifier ( ValueList )]
   #    [ identifier = identifier ]
   #    [ identifier = ( IdentifierList )]
   #    [ identifier = ConstValue ]
   #    [ identifier = identifier ( ArgumentList )]
   # [51] map directly to 74-77
   # [52-54, 56] are unsupported
@@ skipping 47 matching lines @@
   print '\n'.join(ast.Tree(accept_props=['PROD', 'TYPE', 'VALUE']))
   if errors:
     print '\nFound %d errors.\n' % errors
 
 
   return errors
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))