Rename SchedulerWorkerThread* to SchedulerWorker*

base/task_scheduler/task_scheduler_impl.h

 // Copyright 2016 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 BASE_TASK_SCHEDULER_TASK_SCHEDULER_IMPL_H_
 #define BASE_TASK_SCHEDULER_TASK_SCHEDULER_IMPL_H_
 
 #include <memory>
 
 #include "base/base_export.h"
@@ skipping 41 matching lines @@
 
  private:
   TaskSchedulerImpl();
 
   void Initialize();
 
   // Returns the worker pool that runs Tasks with |traits|.
   SchedulerWorkerPool* GetWorkerPoolForTraits(const TaskTraits& traits);
 
   // Callback invoked when a non-single-thread |sequence| isn't empty after a
-  // worker thread pops a Task from it.
+  // worker pops a Task from it.
   void ReEnqueueSequenceCallback(scoped_refptr<Sequence> sequence);
 
   // Callback invoked when the delayed run time is changed from the
   // DelayedTaskManager.
   void OnDelayedRunTimeUpdated();
 
   TaskTracker task_tracker_;
   DelayedTaskManager delayed_task_manager_;
 
   // Worker pool for BACKGROUND Tasks without file I/O.
@@ skipping 15 matching lines @@
   WaitableEvent join_for_testing_returned_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(TaskSchedulerImpl);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_TASK_SCHEDULER_TASK_SCHEDULER_IMPL_H_