Automated IWYU fix for TaskRunner includes.

chrome/browser/chromeos/policy/device_local_account_policy_store.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/policy/device_local_account_policy_store.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
+#include "base/sequenced_task_runner.h"
 #include "components/ownership/owner_key_util.h"
 #include "components/policy/core/common/cloud/device_management_service.h"
 #include "components/policy/core/common/external_data_fetcher.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_types.h"
 #include "components/policy/proto/cloud_policy.pb.h"
 #include "components/policy/proto/device_management_backend.pb.h"
 
 using RetrievePolicyResponseType =
     chromeos::SessionManagerClient::RetrievePolicyResponseType;
@@ skipping 199 matching lines @@
     UserCloudPolicyValidator::StartValidation(
         std::move(validator), base::Bind(callback, key->as_string()));
   } else {
     validator->RunValidation();
 
     UpdatePolicy(key->as_string(), validator.get());
   }
 }
 
 }  // namespace policy