scheduler: Suspend timers while virtual time is paused

third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
index d9415752fc98bb48918f9e70d29226d9d38da931..be6898d25bdadedb225aeae2b2da81e6f1e1ccb2 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.cc
@@ -1203,6 +1203,9 @@ void RendererSchedulerImpl::ApplyTaskQueuePolicy(
 
   if (old_task_queue_policy.time_domain_type !=
       new_task_queue_policy.time_domain_type) {
+    if (old_task_queue_policy.time_domain_type == TimeDomainType::VIRTUAL)
+      task_queue->SetTimeDomain(real_time_domain());

[alex clarke (OOO till 29th), 2017/03/09 11:11:33]

Setting this redundantly is cheap.  Maybe just move this into the two non
virtual if clauses below for clarity?

[Sami, 2017/03/09 11:25:33]

Done. (FWIW setting this takes a lock, but I think this transition happens
rarely enough that it doesn't matter.)

+
     if (old_task_queue_policy.time_domain_type == TimeDomainType::THROTTLED) {
       task_queue_throttler_->DecreaseThrottleRefCount(task_queue);
     } else if (new_task_queue_policy.time_domain_type ==
@@ -1822,6 +1825,17 @@ void RendererSchedulerImpl::EnableVirtualTime() {
   ForceUpdatePolicy();
 }
 
+void RendererSchedulerImpl::DisableVirtualTimeForTesting() {
+  MainThreadOnly().use_virtual_time = false;
+
+  RealTimeDomain* time_domain = real_time_domain();
+  // The |unthrottled_task_runners_| are not actively managed by UpdatePolicy().
+  for (const scoped_refptr<TaskQueue>& task_queue : unthrottled_task_runners_)
+    task_queue->SetTimeDomain(time_domain);
+
+  ForceUpdatePolicy();
+}
+
 bool RendererSchedulerImpl::ShouldDisableThrottlingBecauseOfAudio(
     base::TimeTicks now) {
   if (!MainThreadOnly().last_audio_state_change)