[IPC fuzzer] Properly generate clusterfuzz flags files.

tools/ipc_fuzzer/scripts/ipc_fuzzer_gen.py

 #!/usr/bin/env python
 # 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.
 
 """Generational ClusterFuzz fuzzer. It generates IPC messages using
 GenerateTraits. Support of GenerateTraits for different types will be gradually
 added.
 """
 
 import os
 import random
 import subprocess
 import sys
 import utils
 
 FUZZER_NAME_OPTION = '--fuzzer-name=generate'
 MAX_IPC_MESSAGES_PER_TESTCASE = 1500
 
 
 class GenerationalFuzzer:
-  def parse_arguments(self):
+  def __init__(self):
     self.args = utils.parse_arguments()
 
-  def set_application_paths(self):
     chrome_application_path = utils.get_application_path()
     chrome_application_directory = os.path.dirname(chrome_application_path)
     self.ipc_fuzzer_binary = utils.get_fuzzer_application_name()
-    self.ipc_replay_binary = utils.get_replay_application_name()
     self.ipc_fuzzer_binary_path = os.path.join(
         chrome_application_directory, self.ipc_fuzzer_binary)
-    self.ipc_replay_binary_path = os.path.join(
-        chrome_application_directory, self.ipc_replay_binary)
 
   def generate_ipcdump_testcase(self):
     ipcdump_testcase_path = (
         utils.random_ipcdump_testcase_path(self.args.output_dir))
     num_ipc_messages = random.randint(1, MAX_IPC_MESSAGES_PER_TESTCASE)
     count_option = '--count=%d' % num_ipc_messages
 
     cmd = [
         self.ipc_fuzzer_binary_path,
         FUZZER_NAME_OPTION,
         count_option,
         ipcdump_testcase_path,
     ]
 
     if subprocess.call(cmd):
       sys.exit('%s failed.' % self.ipc_fuzzer_binary)
 
-    utils.create_flags_file(ipcdump_testcase_path, self.ipc_replay_binary_path)
+    utils.create_flags_file(ipcdump_testcase_path)
 
   def main(self):
-    self.parse_arguments()
-    self.set_application_paths()
     for _ in xrange(self.args.no_of_files):
       self.generate_ipcdump_testcase()
 
     return 0
 
+
 if __name__ == "__main__":
   fuzzer = GenerationalFuzzer()
   sys.exit(fuzzer.main())