mojo: add handle<shared_buffer> support to generator

mojo/public/bindings/pylib/parse/mojo_lexer.py

 # Copyright 2014 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.
 
 import re
 import sys
 import os.path
 
 # Try to load the ply module, if not, then assume it is in the third_party
 # directory.
@@ skipping 37 matching lines @@
     raise LexError(self.filename, token.lineno, msg)
 
   ##
   ## Reserved keywords
   ##
   keywords = (
     'HANDLE',
     'DATA_PIPE_CONSUMER',
     'DATA_PIPE_PRODUCER',
     'MESSAGE_PIPE',
+    'SHARED_BUFFER',
 
     'IMPORT',
     'MODULE',
     'STRUCT',
     'INTERFACE',
     'ENUM',
   )
 
   keyword_map = {}
   for keyword in keywords:
@@ skipping 219 matching lines @@
     return t
 
   # Ignore C and C++ style comments
   def t_COMMENT(self, t):
     r'(/\*(.|\n)*?\*/)|(//.*(\n[ \t]*//.*)*)'
     pass
 
   def t_error(self, t):
     msg = 'Illegal character %s' % repr(t.value[0])
     self._error(msg, t)