Revert of Remove SequencedWorkerPool::PostWorkerTask().

base/threading/sequenced_worker_pool.cc

 // Copyright (c) 2012 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/threading/sequenced_worker_pool.h"
 
 #include <stdint.h>
 
 #include <list>
 #include <map>
@@ skipping 1527 matching lines @@
   return new PoolSequencedTaskRunner(
       this, token, shutdown_behavior);
 }
 
 scoped_refptr<TaskRunner>
 SequencedWorkerPool::GetTaskRunnerWithShutdownBehavior(
     WorkerShutdown shutdown_behavior) {
   return new SequencedWorkerPoolTaskRunner(this, shutdown_behavior);
 }
 
+bool SequencedWorkerPool::PostWorkerTask(
+    const tracked_objects::Location& from_here,
+    OnceClosure task) {
+  return inner_->PostTask(NULL, SequenceToken(), BLOCK_SHUTDOWN, from_here,
+                          std::move(task), TimeDelta());
+}
+
 bool SequencedWorkerPool::PostWorkerTaskWithShutdownBehavior(
     const tracked_objects::Location& from_here,
     OnceClosure task,
     WorkerShutdown shutdown_behavior) {
   return inner_->PostTask(NULL, SequenceToken(), shutdown_behavior, from_here,
                           std::move(task), TimeDelta());
 }
 
 bool SequencedWorkerPool::PostSequencedWorkerTask(
     SequenceToken sequence_token,
@@ skipping 69 matching lines @@
 bool SequencedWorkerPool::IsShutdownInProgress() {
   return inner_->IsShutdownInProgress();
 }
 
 bool SequencedWorkerPool::IsRunningSequenceOnCurrentThread(
     SequenceToken sequence_token) const {
   return inner_->IsRunningSequenceOnCurrentThread(sequence_token);
 }
 
 }  // namespace base