Make SequencedWorkerPool::IsRunningSequenceOnCurrentThread() private.

base/threading/sequenced_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_SEQUENCED_WORKER_POOL_H_
 #define BASE_THREADING_SEQUENCED_WORKER_POOL_H_
 
 #include <stddef.h>
 
 #include <cstddef>
@@ skipping 305 matching lines @@
       const tracked_objects::Location& from_here,
       const Closure& task,
       WorkerShutdown shutdown_behavior);
 
   // TaskRunner implementation. Forwards to PostDelayedWorkerTask().
   bool PostDelayedTask(const tracked_objects::Location& from_here,
                        const Closure& task,
                        TimeDelta delay) override;
   bool RunsTasksOnCurrentThread() const override;
 
-  // Returns true if the current thread is processing a task with the given
-  // sequence_token.
-  bool IsRunningSequenceOnCurrentThread(SequenceToken sequence_token) const;
-
   // Blocks until all pending tasks are complete. This should only be called in
   // unit tests when you want to validate something that should have happened.
   // This will not flush delayed tasks; delayed tasks get deleted.
   //
   // Note that calling this will not prevent other threads from posting work to
   // the queue while the calling thread is waiting on Flush(). In this case,
   // Flush will return only when there's no more work in the queue. Normally,
   // this doesn't come up since in a test, all the work is being posted from
   // the main thread.
   void FlushForTesting();
@@ skipping 23 matching lines @@
 
  protected:
   ~SequencedWorkerPool() override;
 
   void OnDestruct() const override;
 
  private:
   friend class RefCountedThreadSafe<SequencedWorkerPool>;
   friend class DeleteHelper<SequencedWorkerPool>;
 
+  class SequencedWorkerPoolSequencedTaskRunner;
   class Inner;
   class Worker;
 
+  // Returns true if the current thread is processing a task with the given
+  // sequence_token.
+  bool IsRunningSequenceOnCurrentThread(SequenceToken sequence_token) const;
+
   const scoped_refptr<SingleThreadTaskRunner> constructor_task_runner_;
 
   // Avoid pulling in too many headers by putting (almost) everything
   // into |inner_|.
   const std::unique_ptr<Inner> inner_;
 
   DISALLOW_COPY_AND_ASSIGN(SequencedWorkerPool);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_SEQUENCED_WORKER_POOL_H_