Move throttling of background timers into the renderer scheduler

components/scheduler/child/scheduler_helper.cc

Index: components/scheduler/child/scheduler_helper.cc
diff --git a/components/scheduler/child/scheduler_helper.cc b/components/scheduler/child/scheduler_helper.cc
index f4081fde958130a00da733500bc63f0b8f37256c..793f2599bf3931c1987a89e5aa22e25c6af710ab 100644
--- a/components/scheduler/child/scheduler_helper.cc
+++ b/components/scheduler/child/scheduler_helper.cc
@@ -124,16 +124,28 @@ void SchedulerHelper::SetObserver(Observer* observer) {
   task_queue_manager_->SetObserver(this);
 }
 
-void SchedulerHelper::OnUnregisterTaskQueue(
-    const scoped_refptr<internal::TaskQueueImpl>& queue) {
-  if (observer_)
-    observer_->OnUnregisterTaskQueue(queue);
+RealTimeDomain* SchedulerHelper::real_time_domain() const {
+  CheckOnValidThread();
+  DCHECK(task_queue_manager_);
+  return task_queue_manager_->real_time_domain();
 }
 
-const scoped_refptr<RealTimeDomain>& SchedulerHelper::real_time_domain() const {
+void SchedulerHelper::RegisterTimeDomain(TimeDomain* time_domain) {
   CheckOnValidThread();
   DCHECK(task_queue_manager_);
-  return task_queue_manager_->real_time_domain();
+  task_queue_manager_->RegisterTimeDomain(time_domain);
+}
+
+void SchedulerHelper::UnregisterTimeDomain(TimeDomain* time_domain) {
+  CheckOnValidThread();
+  if (task_queue_manager_)
+    task_queue_manager_->UnregisterTimeDomain(time_domain);
+}
+
+void SchedulerHelper::OnUnregisterTaskQueue(
+    const scoped_refptr<internal::TaskQueueImpl>& queue) {
+  if (observer_)
+    observer_->OnUnregisterTaskQueue(queue);
 }
 
 }  // namespace scheduler