Add pnacl shims to the chrome build.

ppapi/generators/generator.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 os
 import sys
 
 # Note: some of these files are imported to register cmdline options.
 from idl_generator import Generator
 from idl_option import ParseOptions
 from idl_outfile import IDLOutFile
 from idl_parser import ParseFiles
 from idl_c_header import HGen
 from idl_gen_pnacl import PnaclGen
 
 
 def Main():
   args = sys.argv[1:]
   # If no arguments are provided, assume we are trying to rebuild the
   # C headers with warnings off.
   if not args:
-    args = ['--wnone', '--cgen', '--range=start,end']
+    args = [
+        '--wnone', '--cgen', '--range=start,end',
+        '--pnacl', '--pnaclshim',
+        '../native_client/src/untrusted/pnacl_irt_shim/pnacl_shim.c',
+    ]
     current_dir = os.path.abspath(os.getcwd())
     script_dir = os.path.abspath(os.path.dirname(__file__))
     if current_dir != script_dir:
       print '\nIncorrect CWD, default run skipped.'
       print 'When running with no arguments set CWD to the scripts directory:'
       print '\t' + script_dir + '\n'
       print 'This ensures correct default paths and behavior.\n'
       return 1
 
   filenames = ParseOptions(args)
   ast = ParseFiles(filenames)
   return Generator.Run(ast)
 
 
 if __name__ == '__main__':
   sys.exit(Main())