In the presubmit for auto-bisect, run pylint and unit tests.

tools/auto_bisect/run_tests

Index: tools/auto_bisect/run_tests
diff --git a/tools/auto_bisect/run_tests b/tools/auto_bisect/run_tests
new file mode 100755
index 0000000000000000000000000000000000000000..0ee241e388ac51662f4883b1f2c8ae4c3d996ee3
--- /dev/null
+++ b/tools/auto_bisect/run_tests
@@ -0,0 +1,27 @@
+#!/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
+
+
+def main():
+  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())