[Android] Ensure perf test runner does not create shards for blacklisted devices.

build/android/pylib/perf/setup.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.
 
 """Generates test runner factory and tests for performance tests."""
 
 import json
 import fnmatch
 import logging
 import os
@@ skipping 80 matching lines @@
   if test_options.test_filter:
     sorted_step_names = fnmatch.filter(sorted_step_names,
                                        test_options.test_filter)
 
   flaky_steps = []
   if test_options.flaky_steps:
     with file(test_options.flaky_steps, 'r') as f:
       flaky_steps = json.load(f)
 
   def TestRunnerFactory(device, shard_index):
-    return test_runner.TestRunner(
-        test_options, device, shard_index, len(all_devices),
-        steps_dict, flaky_steps)
+    if str(device) in active_devices:
+      return test_runner.TestRunner(
+          test_options, device, shard_index, len(all_devices),
+          steps_dict, flaky_steps)
+    return None
 
   return (TestRunnerFactory, sorted_step_names, all_devices)