[Android] Refactor so that few pieces can be reused downstream.

build/android/buildbot/tests/bb_run_bot_test.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 import os
 import subprocess
 import sys
 
 BUILDBOT_DIR = os.path.join(os.path.dirname(__file__), '..')
 sys.path.append(BUILDBOT_DIR)
 import bb_run_bot
 
-
-def main():
+def RunBotsWithTesting(bot_step_map):
   code = 0
   procs = [
       (bot, subprocess.Popen(
           [os.path.join(BUILDBOT_DIR, 'bb_run_bot.py'), '--bot-id', bot,
           '--testing'], stdout=subprocess.PIPE, stderr=subprocess.PIPE))
-      for bot in bb_run_bot.GetBotStepMap()]
+      for bot in bot_step_map]
   for bot, proc in procs:
     _, err = proc.communicate()
     code |= proc.returncode
     if proc.returncode != 0:
       print 'Error running bb_run_bot with id="%s"' % bot, err
 
   return code
 
 
+def main():
+  return RunBotsWithTesting(bb_run_bot.GetBotStepMap())
+
+
 if __name__ == '__main__':
   sys.exit(main())