adb: move known devices file under cache so it works with remote_run (attempt #2)

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 27 matching lines @@
   @property
   def out_path(self):
     return self.m.path['checkout'].join('out')
 
   @property
   def coverage_dir(self):
     return self.out_path.join(self.c.BUILD_CONFIG, 'coverage')
 
   @property
   def known_devices_file(self):
-    # TODO(phajdan.jr): Remove path['build'] usage, http://crbug.com/437264 .
-    return self.m.path['build'].join('site_config', '.known_devices')
+    return self.m.path['cache'].join('known_android_devices')
 
   @property
   def file_changes_path(self):
     """Get or create the path to the file containing changes for this revision.
 
     This file will contain a dict mapping file paths to lists of changed lines
     for each file. This is used to generate incremental coverage reports.
     """
     if not self._file_changes_path:
       self._file_changes_path = (
@@ skipping 1300 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)