Rename SchedulerWorkerThread* to SchedulerWorker*

base/task_scheduler/scheduler_worker.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_SCHEDULER_WORKER_THREAD_H_
-#define BASE_TASK_SCHEDULER_SCHEDULER_WORKER_THREAD_H_
+#ifndef BASE_TASK_SCHEDULER_SCHEDULER_WORKER_H_
+#define BASE_TASK_SCHEDULER_SCHEDULER_WORKER_H_
 
 #include <memory>
 
 #include "base/base_export.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/task_scheduler/scheduler_lock.h"
 #include "base/task_scheduler/sequence.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 
 namespace base {
 namespace internal {
 
 class TaskTracker;
 
 // A thread that runs Tasks from Sequences returned by a delegate.
 //
-// A SchedulerWorkerThread starts out sleeping. It is woken up by a call to
-// WakeUp(). After a wake-up, a SchedulerWorkerThread runs Tasks from Sequences
-// returned by the GetWork() method of its delegate as long as it doesn't return
-// nullptr. It also periodically checks with its TaskTracker whether shutdown
-// has completed and exits when it has.
+// A SchedulerWorker starts out sleeping. It is woken up by a call to WakeUp().
+// After a wake-up, a SchedulerWorker runs Tasks from Sequences returned by the
+// GetWork() method of its delegate as long as it doesn't return nullptr. It
+// also periodically checks with its TaskTracker whether shutdown has completed
+// and exits when it has.
 //
 // This class is thread-safe.
-class BASE_EXPORT SchedulerWorkerThread : public PlatformThread::Delegate {
+class BASE_EXPORT SchedulerWorker : public PlatformThread::Delegate {
  public:
-  // Delegate interface for SchedulerWorkerThread. The methods are always called
-  // from the thread managed by the SchedulerWorkerThread instance.
+  // Delegate interface for SchedulerWorker. The methods are always called from
+  // a thread managed by the SchedulerWorker instance.
   class Delegate {
    public:
     virtual ~Delegate() = default;
 
-    // Called by |worker_thread| when it enters its main function.
-    virtual void OnMainEntry(SchedulerWorkerThread* worker_thread) = 0;
+    // Called by a thread managed by |worker| when it enters its main function.
+    virtual void OnMainEntry(SchedulerWorker* worker) = 0;
 
-    // Called by |worker_thread| to get a Sequence from which to run a Task.
-    virtual scoped_refptr<Sequence> GetWork(
-        SchedulerWorkerThread* worker_thread) = 0;
+    // Called by a thread managed by |worker| to get a Sequence from which to
+    // run a Task.
+    virtual scoped_refptr<Sequence> GetWork(SchedulerWorker* worker) = 0;
 
-    // Called when |sequence| isn't empty after the SchedulerWorkerThread pops a
-    // Task from it. |sequence| is the last Sequence returned by GetWork().
+    // Called when |sequence| isn't empty after the SchedulerWorker pops a Task
+    // from it. |sequence| is the last Sequence returned by GetWork().
     virtual void ReEnqueueSequence(scoped_refptr<Sequence> sequence) = 0;
 
-    // Called by |worker_thread| to determine how long to sleep before the next
-    // call to GetWork(). GetWork() may be called before this timeout expires
-    // if the thread's WakeUp() method is called.
+    // Called by a thread to determine how long to sleep before the next call to
+    // GetWork(). GetWork() may be called before this timeout expires if the
+    // worker's WakeUp() method is called.
     virtual TimeDelta GetSleepTimeout() = 0;
   };
 
-  // Creates a SchedulerWorkerThread with priority |thread_priority| that runs
-  // Tasks from Sequences returned by |delegate|. |task_tracker| is used to
-  // handle shutdown behavior of Tasks. Returns nullptr if creating the
-  // underlying platform thread fails.
-  static std::unique_ptr<SchedulerWorkerThread> Create(
+  // Creates a SchedulerWorker with priority |thread_priority| that runs Tasks
+  // from Sequences returned by |delegate|. |task_tracker| is used to handle
+  // shutdown behavior of Tasks. Returns nullptr if creating the underlying
+  // platform thread fails.
+  static std::unique_ptr<SchedulerWorker> Create(
       ThreadPriority thread_priority,
       std::unique_ptr<Delegate> delegate,
       TaskTracker* task_tracker);
 
-  // Destroying a SchedulerWorkerThread in production is not allowed; it is
-  // always leaked. In tests, it can only be destroyed after JoinForTesting()
-  // has returned.
-  ~SchedulerWorkerThread() override;
+  // Destroying a SchedulerWorker in production is not allowed; it is always
+  // leaked. In tests, it can only be destroyed after JoinForTesting() has
+  // returned.
+  ~SchedulerWorker() override;
 
-  // Wakes up this SchedulerWorkerThread if it wasn't already awake. After this
-  // is called, this SchedulerWorkerThread will run Tasks from Sequences
+  // Wakes up this SchedulerWorker if it wasn't already awake. After this
+  // is called, this SchedulerWorker will run Tasks from Sequences
   // returned by the GetWork() method of its delegate until it returns nullptr.
   void WakeUp();
 
-  SchedulerWorkerThread::Delegate* delegate() { return delegate_.get(); }
+  SchedulerWorker::Delegate* delegate() { return delegate_.get(); }
 
-  // Joins this SchedulerWorkerThread. If a Task is already running, it will be
+  // Joins this SchedulerWorker. If a Task is already running, it will be
   // allowed to complete its execution. This can only be called once.
   void JoinForTesting();
 
  private:
-  SchedulerWorkerThread(ThreadPriority thread_priority,
-                        std::unique_ptr<Delegate> delegate,
-                        TaskTracker* task_tracker);
+  SchedulerWorker(ThreadPriority thread_priority,
+                  std::unique_ptr<Delegate> delegate,
+                  TaskTracker* task_tracker);
 
   // PlatformThread::Delegate:
   void ThreadMain() override;
 
   bool ShouldExitForTesting() const;
 
-  // Platform thread managed by this SchedulerWorkerThread.
+  // Platform thread managed by this SchedulerWorker.
   PlatformThreadHandle thread_handle_;
 
-  // Event signaled to wake up this SchedulerWorkerThread.
+  // Event signaled to wake up this SchedulerWorker.
   WaitableEvent wake_up_event_;
 
   const std::unique_ptr<Delegate> delegate_;
   TaskTracker* const task_tracker_;
 
   // Synchronizes access to |should_exit_for_testing_|.
   mutable SchedulerLock should_exit_for_testing_lock_;
 
   // True once JoinForTesting() has been called.
   bool should_exit_for_testing_ = false;
 
-  DISALLOW_COPY_AND_ASSIGN(SchedulerWorkerThread);
+  DISALLOW_COPY_AND_ASSIGN(SchedulerWorker);
 };
 
 }  // namespace internal
 }  // namespace base
 
-#endif  // BASE_TASK_SCHEDULER_SCHEDULER_WORKER_THREAD_H_
+#endif  // BASE_TASK_SCHEDULER_SCHEDULER_WORKER_H_