[Android] Use more specific host platforms for devil.

build/android/test_runner.py

 #!/usr/bin/env python
 #
 # Copyright 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.
 
 """Runs all types of tests from one unified interface."""
 
 import argparse
 import collections
 import itertools
 import logging
 import os
 import signal
 import sys
 import threading
 import unittest
 
 import devil_chromium
 
 from devil import base_error
+from devil import devil_env
 from devil.android import apk_helper
 from devil.android import device_blacklist
 from devil.android import device_errors
 from devil.android import device_utils
 from devil.android import ports
 from devil.utils import reraiser_thread
 from devil.utils import run_tests_helper
 
 from pylib import constants
 from pylib import forwarder
@@ skipping 83 matching lines @@
   constants.SetBuildType(args.build_type)
   if args.build_directory:
     constants.SetBuildDirectory(args.build_directory)
   if args.output_directory:
     constants.SetOutputDirectory(args.output_directory)
 
   devil_custom_deps = None
   if args.adb_path:
     devil_custom_deps = {
       'adb': {
-        'android_host': [args.adb_path]
+        devil_env.GetPlatform(): [args.adb_path]
       }
     }
 
   devil_chromium.Initialize(
       output_directory=constants.GetOutDirectory(),
       custom_deps=devil_custom_deps)
 
   # Some things such as Forwarder require ADB to be in the environment path.
   adb_dir = os.path.dirname(constants.GetAdbPath())
   if adb_dir and adb_dir not in os.environ['PATH'].split(os.pathsep):
@@ skipping 903 matching lines @@
     if e.is_infra_error:
       return constants.INFRA_EXIT_CODE
     return constants.ERROR_EXIT_CODE
   except: # pylint: disable=W0702
     logging.exception('Unrecognized error occurred.')
     return constants.ERROR_EXIT_CODE
 
 
 if __name__ == '__main__':
   sys.exit(main())