Automated IWYU fix for TaskRunner includes.

components/policy/core/common/policy_loader_ios_unittest.mm

 // Copyright 2014 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.
 
 #include "components/policy/core/common/policy_loader_ios.h"
 
 #import <UIKit/UIKit.h>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
+#include "base/sequenced_task_runner.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/values.h"
 #include "components/policy/core/common/async_policy_provider.h"
 #include "components/policy/core/common/configuration_policy_provider_test.h"
 #include "components/policy/core/common/policy_bundle.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_test_utils.h"
 #include "components/policy/core/common/policy_types.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 239 matching lines @@
 
   scoped_refptr<base::TestSimpleTaskRunner> taskRunner =
       new base::TestSimpleTaskRunner();
   PolicyLoaderIOS loader(taskRunner);
   std::unique_ptr<PolicyBundle> bundle = loader.Load();
   ASSERT_TRUE(bundle);
   EXPECT_TRUE(bundle->Equals(expected));
 }
 
 }  // namespace policy