Add presubmit to run sandbox tests on Win 10.

BUG=513354
CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win10_chromium_x64_rel_ng

Review URL: https://codereview.chromium.org/1923603002

Cr-Commit-Position: refs/heads/master@{#389847}

sandbox/win/PRESUBMIT.py

+# Copyright 2016 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.
+
+"""Presubmit script for sandbox/win.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into depot_tools.
+"""
+
+import re
+
+def PostUploadHook(cl, change, output_api):
+  """git cl upload will call this hook after the issue is created/modified.
+
+  This hook adds extra try bots list to the CL description in order to run
+  tests on the Windows 10 try bot in addition to CQ try bots.
+  """
+  rietveld_obj = cl.RpcServer()
+  issue = cl.issue
+  description = rietveld_obj.get_description(issue)
+  if re.search(r'^CQ_INCLUDE_TRYBOTS=.*', description, re.M | re.I):
+    return []
+
+  bots = [
+    'tryserver.chromium.win:win10_chromium_x64_rel_ng',
+  ]
+
+  results = []
+  new_description = description
+  new_description += '\nCQ_INCLUDE_TRYBOTS=%s' % ';'.join(bots)
+  results.append(output_api.PresubmitNotifyResult(
+      'Automatically added Win10 bot to run on CQ.'))
+
+  if new_description != description:
+    rietveld_obj.update_description(issue, new_description)
+
+  return results