Automated IWYU fix for TaskRunner includes.

tools/battor_agent/battor_agent.h

 // Copyright 2015 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 TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_
 #define TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_
 
 #include <map>
 
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_checker.h"
 #include "tools/battor_agent/battor_connection.h"
 #include "tools/battor_agent/battor_error.h"
 
 namespace battor {
 
 // A BattOrAgent is a class used to asynchronously communicate with a BattOr for
 // the purpose of collecting power samples. A BattOr is an external USB device
 // that's capable of recording accurate, high-frequency (2000Hz) power samples.
 //
@@ skipping 170 matching lines @@
 
   // The git hash of the BattOr firmware.
   std::string firmware_git_hash_;
 
   DISALLOW_COPY_AND_ASSIGN(BattOrAgent);
 };
 
 }  // namespace battor
 
 #endif  // TOOLS_BATTOR_AGENT_BATTOR_AGENT_H_