TaskScheduler: Pop a Task from its Sequence from SchedulerWorkerThread.

base/task_scheduler/scheduler_worker_thread.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_
 
 #include <memory>
 
 #include "base/base_export.h"
@@ skipping 29 matching lines @@
     // Called when the main function of the SchedulerWorkerThread enters.
     virtual void OnMainEntry() = 0;
 
     // Called when the main function of the SchedulerWorkerThread exits.
     virtual void OnMainExit() = 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 after the SchedulerWorkerThread has tried to run a Task from
-    // |sequence| (a TaskTracker might have prevented the Task from running).
-    // The Task is still in |sequence| when this is called.
-    virtual void RanTaskFromSequence(scoped_refptr<Sequence> sequence) = 0;
+    // Called when |sequence| isn't empty after the SchedulerWorkerThread pops a
+    // Task from it. |sequence| is the last Sequence returned by GetWork().
+    virtual void EnqueueSequence(scoped_refptr<Sequence> sequence) = 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> CreateSchedulerWorkerThread(
       ThreadPriority thread_priority,
       Delegate* delegate,
       TaskTracker* task_tracker);
@@ skipping 37 matching lines @@
   // True once JoinForTesting() has been called.
   bool should_exit_for_testing_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerWorkerThread);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_TASK_SCHEDULER_SCHEDULER_WORKER_THREAD_H_