Move throttling of background timers into the renderer scheduler

components/scheduler/renderer/renderer_scheduler_impl.cc

Index: components/scheduler/renderer/renderer_scheduler_impl.cc
diff --git a/components/scheduler/renderer/renderer_scheduler_impl.cc b/components/scheduler/renderer/renderer_scheduler_impl.cc
index 0ee5481dcf20774973ab936515d0273eee81992c..64d904f3da57928a29a94533b70e0ef2307936d7 100644
--- a/components/scheduler/renderer/renderer_scheduler_impl.cc
+++ b/components/scheduler/renderer/renderer_scheduler_impl.cc
@@ -12,6 +12,7 @@
 #include "cc/output/begin_frame_args.h"
 #include "components/scheduler/base/task_queue_impl.h"
 #include "components/scheduler/base/task_queue_selector.h"
+#include "components/scheduler/base/virtual_time_domain.h"
 #include "components/scheduler/child/scheduler_tqm_delegate.h"
 #include "components/scheduler/renderer/webthread_impl_for_renderer_scheduler.h"
 
@@ -41,6 +42,7 @@ RendererSchedulerImpl::RendererSchedulerImpl(
                    TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"),
                    "RendererSchedulerIdlePeriod",
                    base::TimeDelta()),
+      throttling_helper_(this, "renderer.scheduler"),
       render_widget_scheduler_signals_(this),
       control_task_runner_(helper_.ControlTaskRunner()),
       compositor_task_runner_(
@@ -66,6 +68,10 @@ RendererSchedulerImpl::RendererSchedulerImpl(
   default_loading_task_runner_ = NewLoadingTaskRunner("default_loading_tq");
   default_timer_task_runner_ = NewTimerTaskRunner("default_timer_tq");
 
+  virtual_time_domain_ = make_scoped_refptr(
+      new VirtualTimeDomain(helper_.scheduler_tqm_delegate()->NowTicks()));
+  helper_.RegisterTimeDomain(virtual_time_domain_);
+
   TRACE_EVENT_OBJECT_CREATED_WITH_ID(
       TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"), "RendererScheduler",
       this);
@@ -78,6 +84,8 @@ RendererSchedulerImpl::~RendererSchedulerImpl() {
       TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"), "RendererScheduler",
       this);
 
+  helper_.UnregisterTimeDomain(virtual_time_domain_);
+
   for (const scoped_refptr<TaskQueue>& loading_queue : loading_task_runners_) {
     loading_queue->RemoveTaskObserver(
         &MainThreadOnly().loading_task_cost_estimator);
@@ -176,6 +184,11 @@ scoped_refptr<TaskQueue> RendererSchedulerImpl::TimerTaskRunner() {
   return default_timer_task_runner_;
 }
 
+scoped_refptr<TaskQueue> RendererSchedulerImpl::ControlTaskRunner() {
+  helper_.CheckOnValidThread();
+  return helper_.ControlTaskRunner();
+}
+
 scoped_refptr<TaskQueue> RendererSchedulerImpl::NewLoadingTaskRunner(
     const char* name) {
   helper_.CheckOnValidThread();
@@ -1046,4 +1059,14 @@ double RendererSchedulerImpl::MonotonicallyIncreasingTimeSeconds() const {
          static_cast<double>(base::Time::kMicrosecondsPerSecond);
 }
 
+void RendererSchedulerImpl::RegisterTimeDomain(
+    const scoped_refptr<TimeDomain>& time_domain) {
+  helper_.RegisterTimeDomain(time_domain);
+}
+
+void RendererSchedulerImpl::UnregisterTimeDomain(
+    const scoped_refptr<TimeDomain>& time_domain) {
+  helper_.UnregisterTimeDomain(time_domain);
+}
+
 }  // namespace scheduler