in_file.py should be able to parse "in" files

Source/core/scripts/in_generator.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 18 matching lines @@
 import os.path
 import shutil
 
 from in_file import InFile
 
 
 class Writer(object):
     # Subclasses should override.
     class_name = None
     defaults = None
+    default_parameters = None
 
     def __init__(self, in_file_path):
-        self.in_file = InFile.load_from_path(in_file_path, self.defaults)
+        self.in_file = InFile.load_from_path(in_file_path, self.defaults, self.default_parameters)
 
     # Subclasses should override.
     def generate_header(self):
         raise NotImplementedError
 
     # Subclasses should override.
     def generate_implementation(self):
         raise NotImplementedError
 
     def _forcibly_create_text_file_at_path_with_contents(self, file_path, contents):
@@ skipping 28 matching lines @@
         script_name = os.path.basename(argv[0])
         args = argv[1:]
         if len(args) < 1:
             print "USAGE: %i INPUT_FILE [OUTPUT_DIRECTORY]" % script_name
             exit(1)
         output_dir = args[1] if len(args) > 1 else os.getcwd()
 
         writer = self._writer_class(args[0])
         writer.write_header(output_dir)
         writer.write_implmentation(output_dir)