Add LogDog bootstrapping to `annotated_run.py`.

environment.cfg.py

 # Copyright 2015 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.
 
 """Extension script to <build>/scripts/common/env.py to add 'build_internal'
 paths.
 """
 
 import os
 
 def Extend(pythonpath, cwd):
   """Path extension function (see common.env).
 
   In this invocation, 'cwd' is the <build> directory.
   """
   third_party_base = os.path.join(cwd, 'third_party')
   build_path = [
+      os.path.join(cwd, os.pardir, 'depot_tools'),
       os.path.join(cwd, 'scripts'),
       os.path.join(cwd, 'site_config'),
       third_party_base,
   ]
 
   # Add 'BUILD/third_party' paths.
   build_path += [os.path.join(third_party_base, *parts) for parts in (
       ('buildbot_8_4p1',),
       ('buildbot_slave_8_4',),
       ('jinja2',),
       ('markupsafe',),
       ('mock-1.0.1',),
       ('coverage-3.7.1',),
       ('twisted_10_2',),
       ('requests_1_2_3',),
       ('sqlalchemy_0_7_1',),
       ('sqlalchemy_migrate_0_7_1',),
       ('tempita_0_5',),
       ('decorator_3_3_1',),
       ('setuptools-0.6c11',),
       ('httplib2', 'python2',),
       ('oauth2client',),
       ('uritemplate',),
       ('google_api_python_client',),
       ('site-packages',),
   )]
   return pythonpath.Append(*build_path)