Add a module to fetch builds from different types of builders.

tools/auto_bisect/mock_wrapper.py

Index: tools/auto_bisect/mock_wrapper.py
diff --git a/tools/auto_bisect/mock_wrapper.py b/tools/auto_bisect/mock_wrapper.py
new file mode 100644
index 0000000000000000000000000000000000000000..1185010d53f912e16728687bd64038dc0b2eaacc
--- /dev/null
+++ b/tools/auto_bisect/mock_wrapper.py
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+# 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.
+
+"""An intermediary used to import the third-party mock module."""
+
+import os
+import sys
+
+sys.path.append(os.path.join(
+    os.path.dirname(__file__), os.path.pardir, os.path.pardir,
+    'third_party', 'pymock'))
+
+# Pylint is unable to import (F0401) because pylint doesn't modify sys.path.
+# A wildcard import is used below (W0401) to get everything from the module.
+# pylint: disable=F0401,W0401
+from mock import *
+