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

tools/auto_bisect/run_tests

 #!/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.
 
 """Runs all tests in all unit test modules in this directory."""
 
 import os
 import sys
 import unittest
 
+SRC = os.path.join(os.path.dirname(__file__), os.path.pardir, os.path.pardir)
+
 
 def main():
+  # Running the tests depends on having the below modules in PYTHONPATH.
+  sys.path.append(os.path.join(SRC, 'tools', 'telemetry'))
+  sys.path.append(os.path.join(SRC, 'third_party', 'pymock'))
+
   suite = unittest.TestSuite()
   loader = unittest.TestLoader()
-
-  # Add all tests in the directory.
   script_dir = os.path.dirname(__file__)
   suite.addTests(loader.discover(start_dir=script_dir, pattern='*_test.py'))
 
   print 'Running unit tests in %s...' % os.path.abspath(script_dir)
   result = unittest.TextTestRunner(verbosity=1).run(suite)
   return 0 if result.wasSuccessful() else 1
 
 
 if __name__ == '__main__':
   sys.exit(main())