Automated IWYU fix for TaskRunner includes.

components/metrics/net/network_metrics_provider.h

 // 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.
 
 #ifndef COMPONENTS_METRICS_NET_NETWORK_METRICS_PROVIDER_H_
 #define COMPONENTS_METRICS_NET_NETWORK_METRICS_PROVIDER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/histogram_base.h"
+#include "base/sequenced_task_runner.h"
 #include "base/threading/thread_checker.h"
 #include "components/metrics/metrics_provider.h"
 #include "components/metrics/net/wifi_access_point_info_provider.h"
 #include "components/metrics/proto/system_profile.pb.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/network_interfaces.h"
 #include "net/nqe/effective_connection_type.h"
 
 namespace net {
 class NetworkQualityEstimator;
@@ skipping 125 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<NetworkMetricsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkMetricsProvider);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_NET_NETWORK_METRICS_PROVIDER_H_