Introduce TaskRunner::RunsTasksInCurrentSequence()

base/threading/worker_pool.h

 // 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.
 
 #ifndef BASE_THREADING_WORKER_POOL_H_
 #define BASE_THREADING_WORKER_POOL_H_
 
 #include "base/base_export.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
@@ skipping 30 matching lines @@
   static bool PostTaskAndReply(const tracked_objects::Location& from_here,
                                OnceClosure task,
                                OnceClosure reply,
                                bool task_is_slow);
 
   // Return true if the current thread is one that this WorkerPool runs tasks
   // on.  (Note that if the Windows worker pool is used without going through
   // this WorkerPool interface, RunsTasksOnCurrentThread would return false on
   // those threads.)
   static bool RunsTasksOnCurrentThread();
+  static bool RunsTasksInCurrentSequence();

[gab, 2017/04/18 15:00:33]

"sequence" isn't a concept of WorkerPool, leave the old call behind (WorkerPool
is being replaced by TaskScheduler anyways and barely has any callers left)

 
   // Get a TaskRunner wrapper which posts to the WorkerPool using the given
   // |task_is_slow| behavior.
   static const scoped_refptr<TaskRunner>& GetTaskRunner(bool task_is_slow);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_WORKER_POOL_H_