Add support for generating thunk source from IDL.

ppapi/generators/idl_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 sys
 
 from idl_log import ErrOut, InfoOut, WarnOut
 from idl_option import GetOption, Option, ParseOptions
 from idl_parser import ParseFiles
 
 GeneratorList = []
 
+Option('out', 'List of output files', default='')
 Option('release', 'Which release to generate.', default='')
 Option('range', 'Which ranges in the form of MIN,MAX.', default='start,end')
 
 class Generator(object):
   """Base class for generators.
 
   This class provides a mechanism for adding new generator objects to the IDL
   driver.  To use this class override the GenerateRelease and GenerateRange
   members, and instantiate one copy of the class in the same module which
   defines it to register the generator.  After the AST is generated, call the
@@ skipping 243 matching lines @@
   if not args: return Test()
   filenames = ParseOptions(args)
   ast = ParseFiles(filenames)
 
   return Generator.Run(ast)
 
 
 if __name__ == '__main__':
   GeneratorReleaseTest('Test Gen', 'testgen', 'Generator Class Test.')
   sys.exit(Main(sys.argv[1:]))