Revert of Adds TimeDomains to the TaskQueueManager

components/scheduler/child/scheduler_helper.cc

 // Copyright 2015 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 "components/scheduler/child/scheduler_helper.h"
 
 #include "base/time/default_tick_clock.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "components/scheduler/base/task_queue_impl.h"
@@ skipping 78 matching lines @@
 TaskQueueManager* SchedulerHelper::GetTaskQueueManagerForTesting() {
   CheckOnValidThread();
   return task_queue_manager_.get();
 }
 
 const scoped_refptr<SchedulerTqmDelegate>&
 SchedulerHelper::scheduler_tqm_delegate() const {
   return task_queue_manager_delegate_;
 }
 
+base::TimeTicks SchedulerHelper::NextPendingDelayedTaskRunTime() const {
+  CheckOnValidThread();
+  DCHECK(task_queue_manager_.get());
+  return task_queue_manager_->NextPendingDelayedTaskRunTime();
+}
 
 bool SchedulerHelper::GetAndClearSystemIsQuiescentBit() {
   CheckOnValidThread();
   DCHECK(task_queue_manager_.get());
   return task_queue_manager_->GetAndClearSystemIsQuiescentBit();
 }
 
 void SchedulerHelper::AddTaskObserver(
     base::MessageLoop::TaskObserver* task_observer) {
   CheckOnValidThread();
@@ skipping 14 matching lines @@
   DCHECK(task_queue_manager_);
   task_queue_manager_->SetObserver(this);
 }
 
 void SchedulerHelper::OnUnregisterTaskQueue(
     const scoped_refptr<internal::TaskQueueImpl>& queue) {
   if (observer_)
     observer_->OnUnregisterTaskQueue(queue);
 }
 
-const scoped_refptr<RealTimeDomain>& SchedulerHelper::real_time_domain() const {
-  CheckOnValidThread();
-  DCHECK(task_queue_manager_);
-  return task_queue_manager_->real_time_domain();
-}
-
 }  // namespace scheduler