Port remaining android buildbot code into python

build/android/buildbot/bb_device_steps.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 collections
 import glob
 import multiprocessing
 import os
 import shutil
@@ skipping 291 matching lines @@
 
   if args:
     return sys.exit('Unused args %s' % args)
 
   unknown_tests = set(options.test_filter) - VALID_TESTS
   if unknown_tests:
     return sys.exit('Unknown tests %s' % list(unknown_tests))
 
   setattr(options, 'target', options.factory_properties.get('target', 'Debug'))
 
-  # Add adb binary and chromium-source platform-tools to tip of PATH variable.
-  android_paths = [os.path.join(constants.ANDROID_SDK_ROOT, 'platform-tools')]
-
-  # Bots checkout chrome in /b/build/slave/<name>/build/src
-  build_internal_android = os.path.abspath(os.path.join(
-      CHROME_SRC, '..', '..', '..', '..', '..', 'build_internal', 'scripts',
-      'slave', 'android'))
-  if os.path.exists(build_internal_android):
-    android_paths.insert(0, build_internal_android)
-  os.environ['PATH'] = os.pathsep.join(android_paths + [os.environ['PATH']])
-
   MainTestWrapper(options)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))