Use a class for CodeGeneratorV8

Source/bindings/scripts/unstable/idl_compiler.py

 #!/usr/bin/python
 # 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
@@ skipping 18 matching lines @@
 
 """Compile an .idl file to Blink V8 bindings (.h and .cpp files).
 
 FIXME: Not currently used in build.
 This is a rewrite of the Perl IDL compiler in Python, but is not complete.
 Once it is complete, we will switch all IDL files over to Python at once.
 Until then, please work on the Perl IDL compiler.
 For details, see bug http://crbug.com/239771
 """
 
-import optparse
+from optparse import OptionParser
 import os
 import cPickle as pickle
 import sys
 
-import code_generator_v8
-import idl_reader
+from code_generator_v8 import CodeGeneratorV8
+from idl_reader import IdlReader
 # from utilities import write_file  # FIXME: import once in same directory
 
 def parse_options():
-    parser = optparse.OptionParser()
+    parser = OptionParser()
     parser.add_option('--idl-attributes-file')
     parser.add_option('--output-directory')
     parser.add_option('--interfaces-info-file')
     parser.add_option('--write-file-only-if-changed', type='int')
     # ensure output comes last, so command line easy to parse via regexes
     parser.disable_interspersed_args()
 
     options, args = parser.parse_args()
     if options.output_directory is None:
         parser.error('Must specify output directory using --output-directory.')
@@ skipping 21 matching lines @@
     output_directory = options.output_directory
     only_if_changed = options.write_file_only_if_changed
 
     interfaces_info_filename = options.interfaces_info_file
     if interfaces_info_filename:
         with open(interfaces_info_filename) as interfaces_info_file:
             interfaces_info = pickle.load(interfaces_info_file)
     else:
         interfaces_info = None
 
-    reader = idl_reader.IdlReader(interfaces_info, options.idl_attributes_file, output_directory)
+    reader = IdlReader(interfaces_info, options.idl_attributes_file, output_directory)
     definitions = reader.read_idl_definitions(idl_filename)
-    header_text, cpp_text = code_generator_v8.generate_header_and_cpp(definitions, interface_name, interfaces_info, output_directory)
+
+    code_generator = CodeGeneratorV8(interfaces_info, output_directory)
+    header_text, cpp_text = code_generator.generate_code(definitions, interface_name)
 
     header_filename = output_directory + 'V8%s.h' % interface_name
     cpp_filename = output_directory + 'V8%s.cpp' % interface_name
     write_file(header_text, header_filename, only_if_changed)
     write_file(cpp_text, cpp_filename, only_if_changed)
 
 
 if __name__ == '__main__':
     sys.exit(main())