Use new common tools in Python scripts

tools/fix_pythonpath.py

Index: tools/fix_pythonpath.py
diff --git a/tools/fix_pythonpath.py b/tools/fix_pythonpath.py
new file mode 100644
index 0000000000000000000000000000000000000000..c84738ac859bc3050692f63eb945125f7898dd69
--- /dev/null
+++ b/tools/fix_pythonpath.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+# Copyright (c) 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.
+
+
+"""Add the checkout root to sys.path, provide mechanisms for adding others."""
+
+
+import os
+import sys
+
+
+CHECKOUT_ROOT = os.path.realpath(os.path.join(
+    os.path.dirname(os.path.abspath(__file__)), os.pardir))
+
+
+def add_to_pythonpath(path):
+  """Add the given directory to PYTHONPATH."""
+  sys.path.append(path)
+
+
+add_to_pythonpath(CHECKOUT_ROOT)
+