Revert of Introduce SchedulerSingleThreadTaskRunnerManager

base/task_scheduler/scheduler_worker_pool_impl.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/scheduler_worker_pool_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 123 matching lines @@
                     const SchedulerWorker* worker) {
   auto it = std::find_if(workers.begin(), workers.end(),
                          [worker](const scoped_refptr<SchedulerWorker>& i) {
                            return i.get() == worker;
                          });
   return it != workers.end();
 }
 
 }  // namespace
 
-// TODO(http://crbug.com/694823): Remove this and supporting framework.
 // A task runner that runs tasks with the SINGLE_THREADED ExecutionMode.
 class SchedulerWorkerPoolImpl::SchedulerSingleThreadTaskRunner :
     public SingleThreadTaskRunner {
  public:
   // Constructs a SchedulerSingleThreadTaskRunner which can be used to post
   // tasks so long as |worker_pool| and |worker| are alive.
   // TODO(robliao): Find a concrete way to manage the memory of |worker_pool|
   // and |worker|.
   SchedulerSingleThreadTaskRunner(const TaskTraits& traits,
                                   SchedulerWorkerPool* worker_pool,
@@ skipping 604 matching lines @@
   AutoSchedulerLock auto_lock(idle_workers_stack_lock_);
   idle_workers_stack_.Remove(worker);
 }
 
 bool SchedulerWorkerPoolImpl::CanWorkerDetachForTesting() {
   return !worker_detachment_disallowed_.IsSet();
 }
 
 }  // namespace internal
 }  // namespace base