Automated IWYU fix for TaskRunner includes.

third_party/WebKit/Source/platform/scheduler/child/worker_scheduler_impl.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 THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WORKER_SCHEDULER_IMPL_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WORKER_SCHEDULER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "platform/scheduler/base/task_time_observer.h"
 #include "platform/scheduler/base/thread_load_tracker.h"
 #include "platform/scheduler/child/idle_canceled_delayed_task_sweeper.h"
 #include "platform/scheduler/child/idle_helper.h"
 #include "platform/scheduler/child/worker_scheduler.h"
 
 namespace blink {
 namespace scheduler {
 
 class SchedulerTqmDelegate;
@@ skipping 46 matching lines @@
   bool initialized_;
   base::TimeTicks thread_start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerSchedulerImpl);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WORKER_SCHEDULER_IMPL_H_