Remove SchedulerWorkerPoolImpl::ReEnqueueSequenceCallback.

base/task_scheduler/task_scheduler_impl.h

Index: base/task_scheduler/task_scheduler_impl.h
diff --git a/base/task_scheduler/task_scheduler_impl.h b/base/task_scheduler/task_scheduler_impl.h
index 1307573ef0479453914e15ce87c1574407d33500..3eb79311ac1be52c93e76f23316600fc3486cf3b 100644
--- a/base/task_scheduler/task_scheduler_impl.h
+++ b/base/task_scheduler/task_scheduler_impl.h
@@ -18,7 +18,6 @@
 #include "base/task_scheduler/delayed_task_manager.h"
 #include "base/task_scheduler/scheduler_single_thread_task_runner_manager.h"
 #include "base/task_scheduler/scheduler_worker_pool_impl.h"
-#include "base/task_scheduler/sequence.h"
 #include "base/task_scheduler/task_scheduler.h"
 #include "base/task_scheduler/task_tracker.h"
 #include "base/task_scheduler/task_traits.h"
@@ -70,10 +69,6 @@ class BASE_EXPORT TaskSchedulerImpl : public TaskScheduler {
   SchedulerWorkerPoolImpl* GetWorkerPoolForTraits(
       const TaskTraits& traits) const;
 
-  // Callback invoked when a non-single-thread |sequence| isn't empty after a
-  // worker pops a Task from it.
-  void ReEnqueueSequenceCallback(scoped_refptr<Sequence> sequence);
-
   const std::string name_;
   Thread service_thread_;
 #if defined(OS_POSIX) && !defined(OS_NACL_SFI)