Skip subprocess2_test suite on upload.

PRESUBMIT.py

 # Copyright (c) 2012 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.
 
 """Top-level presubmit script for depot tools.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
 details on the presubmit API built into depot_tools.
 """
 
@@ skipping 78 matching lines @@
     server.stop_server()
   return results
 
 
 def CheckChangeOnUpload(input_api, output_api):
   # Do not run integration tests on upload since they are way too slow.
   tests_to_black_list = [
       r'^checkout_test\.py$',
       r'^gclient_smoketest\.py$',
       r'^scm_unittest\.py$',
+      r'^subprocess2_test\.py$',
     ]
   return CommonChecks(input_api, output_api, tests_to_black_list)
 
 
 def CheckChangeOnCommit(input_api, output_api):
   output = []
   output.extend(CommonChecks(input_api, output_api, []))
   output.extend(input_api.canned_checks.CheckDoNotSubmit(
       input_api,
       output_api))
   output.extend(RunGitClTests(input_api, output_api))
   return output