[cherrypick] Fix computation of runtime for throttled tasks

components/scheduler/base/virtual_time_domain.cc

Index: components/scheduler/base/virtual_time_domain.cc
diff --git a/components/scheduler/base/virtual_time_domain.cc b/components/scheduler/base/virtual_time_domain.cc
index 0abea9493c342d8a478fa69a2477a442d573070d..97c63da5cdaba218d07f2acd5e69ca7d36ff2cab 100644
--- a/components/scheduler/base/virtual_time_domain.cc
+++ b/components/scheduler/base/virtual_time_domain.cc
@@ -28,6 +28,12 @@ LazyNow VirtualTimeDomain::CreateLazyNow() {
   return LazyNow(now_);
 }
 
+base::TimeTicks VirtualTimeDomain::ComputeDelayedRunTime(
+    base::TimeTicks time_domain_now,
+    base::TimeDelta delay) const {
+  return time_domain_now + delay;
+}
+
 void VirtualTimeDomain::RequestWakeup(LazyNow* lazy_now,
                                       base::TimeDelta delay) {
   // We don't need to do anything here because the caller of AdvanceTo is