Fix python scripts in src/chrome/

chrome/test/chromeos/autotest/files/client/deps/pyauto_dep/pyauto_dep.py

Index: chrome/test/chromeos/autotest/files/client/deps/pyauto_dep/pyauto_dep.py
diff --git a/chrome/test/chromeos/autotest/files/client/deps/pyauto_dep/pyauto_dep.py b/chrome/test/chromeos/autotest/files/client/deps/pyauto_dep/pyauto_dep.py
index 444d395c5f9f2c5a814bf1cfd17a8e52e16c7198..132c3ce40d1acb4f74dd01e334c41b7696735f45 100755
--- a/chrome/test/chromeos/autotest/files/client/deps/pyauto_dep/pyauto_dep.py
+++ b/chrome/test/chromeos/autotest/files/client/deps/pyauto_dep/pyauto_dep.py
@@ -1,5 +1,4 @@
-#!/usr/bin/python
-
+#!/usr/bin/env python
 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
@@ -18,5 +17,10 @@ def setup(top_dir):
     return
 
 
-pwd = os.getcwd()
-utils.update_version(pwd + '/src', False, version, setup, None)
+def main():
+  pwd = os.getcwd()
+  utils.update_version(pwd + '/src', False, version, setup, None)
+
+
+if __name__ == '__main__':
+  sys.exit(main())