[Findit] Add iterator and crash_iterator for delta test

appengine/findit/util_scripts/script_util.py

Index: appengine/findit/util_scripts/script_util.py
diff --git a/appengine/findit/util_scripts/script_util.py b/appengine/findit/util_scripts/script_util.py
new file mode 100644
index 0000000000000000000000000000000000000000..1d9846d437f3a7cb4731b5c728d05b11631c2e02
--- /dev/null
+++ b/appengine/findit/util_scripts/script_util.py
@@ -0,0 +1,27 @@
+# Copyright 2016 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.
+
+"""This module contains util functions that local scripts can use."""
+
+import os
+import sys
+
+
+def SetUpSystemPaths():
+  """Sets system paths so as to import modules in findit, third_party and
+  appengine."""
+  findit_root_dir = os.path.join(os.path.dirname(__file__), os.path.pardir)
+  third_party_dir = os.path.join(findit_root_dir, 'third_party')
+  appengine_sdk_dir = os.path.join(findit_root_dir, os.path.pardir,
+                                   os.path.pardir, os.path.pardir,
+                                   'google_appengine')
+
+  # Add App Engine SDK dir to sys.path.
+  sys.path.insert(1, appengine_sdk_dir)
+  sys.path.insert(1, third_party_dir)
+  import dev_appserver
+  dev_appserver.fix_sys_path()
+
+  # Add Findit root dir to sys.path so that modules in Findit is available.
+  sys.path.insert(1, findit_root_dir)