Rename SchedulerWorkerThread* to SchedulerWorker*

base/task_scheduler/task_tracker.cc

 // 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.
 
 #include "base/task_scheduler/task_tracker.h"
 
 #include "base/callback.h"
 #include "base/debug/task_annotator.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/threading/sequenced_task_runner_handle.h"
@@ skipping 153 matching lines @@
 
 bool TaskTracker::BeforeRunTask(TaskShutdownBehavior shutdown_behavior) {
   AutoSchedulerLock auto_lock(lock_);
 
   if (shutdown_completed_) {
     // Trying to run a BLOCK_SHUTDOWN task after shutdown has completed is
     // unexpected as it either shouldn't have been posted if shutdown completed
     // or should be blocking shutdown if it was posted before it did.
     DCHECK_NE(shutdown_behavior, TaskShutdownBehavior::BLOCK_SHUTDOWN);
 
-    // A WorkerThread might extract a non BLOCK_SHUTDOWN task from a
-    // PriorityQueue after shutdown. It shouldn't be allowed to run it.
+    // A worker might extract a non BLOCK_SHUTDOWN task from a PriorityQueue
+    // after shutdown. It shouldn't be allowed to run it.
     return false;
   }
 
   switch (shutdown_behavior) {
     case TaskShutdownBehavior::BLOCK_SHUTDOWN:
       DCHECK_GT(num_tasks_blocking_shutdown_, 0U);
       return true;
 
     case TaskShutdownBehavior::SKIP_ON_SHUTDOWN:
       if (shutdown_cv_)
@@ skipping 17 matching lines @@
     AutoSchedulerLock auto_lock(lock_);
     DCHECK_GT(num_tasks_blocking_shutdown_, 0U);
     --num_tasks_blocking_shutdown_;
     if (num_tasks_blocking_shutdown_ == 0 && shutdown_cv_)
       shutdown_cv_->Signal();
   }
 }
 
 }  // namespace internal
 }  // namespace base