[Android] Pass known devices file path to host info to detect missing devices.

scripts/slave/recipe_modules/chromium_android/api.py

 # 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.
 
 import contextlib
 import datetime
 import json
 import os
 import re
 import sys
@@ skipping 356 matching lines @@
     # crrev.com/1faecde0c03013b6cd725da413339c60223f8948 are no longer tested.
     # See crbug.com/619707 for context.
     self.revert_device_file_format()
     self.device_recovery()
     return self.device_status()
 
   def host_info(self, args=[], **kwargs):
     results = None
     try:
       with self.handle_exit_codes():
+        if self.known_devices_file:
+          known_devices_arg = ['--known-devices-path', self.known_devices_file]
+          args.extend(['--args', self.m.json.input(known_devices_arg)])
         args.extend(['run', '--output', self.m.json.output()])
         results = self.m.step(
             'Host Info',
             [self.m.path['checkout'].join('testing', 'scripts',
                                           'host_info.py')] + args,
             env=self.m.chromium.get_env(),
             infra_step=True,
             step_test_data=lambda: self.m.json.test_api.output({
                 'valid': True,
                 'failures': [],
@@ skipping 1082 matching lines @@
       script = self.c.test_runner
       if wrapper_script_suite_name:
         script = self.m.chromium.output_dir.join('bin', 'run_%s' %
                                                  wrapper_script_suite_name)
       else:
         env = kwargs.get('env', {})
         env['CHROMIUM_OUTPUT_DIR'] = env.get('CHROMIUM_OUTPUT_DIR',
                                              self.m.chromium.output_dir)
         kwargs['env'] = env
       return self.m.python(step_name, script, args, **kwargs)