Fix a bug that could occasionaly cause setInterval to stop

components/scheduler/renderer/throttling_helper_unittest.cc

Index: components/scheduler/renderer/throttling_helper_unittest.cc
diff --git a/components/scheduler/renderer/throttling_helper_unittest.cc b/components/scheduler/renderer/throttling_helper_unittest.cc
index 117e9a2baa0489dc506b2c563b69207870db5c20..cae2b7f9ca0dea078c17074df4a8081e4f8cbfdc 100644
--- a/components/scheduler/renderer/throttling_helper_unittest.cc
+++ b/components/scheduler/renderer/throttling_helper_unittest.cc
@@ -360,6 +360,18 @@ TEST_F(ThrottlingHelperTest, TaskDelayIsBasedOnRealTime) {
           base::TimeTicks() + base::TimeDelta::FromMilliseconds(3000.0)));
 }
 
+TEST_F(ThrottlingHelperTest, ThrottledTasksReportRealTime) {
+  EXPECT_EQ(timer_queue_->GetTimeDomain()->Now(), clock_->NowTicks());
+
+  throttling_helper_->IncreaseThrottleRefCount(timer_queue_.get());
+  EXPECT_EQ(timer_queue_->GetTimeDomain()->Now(), clock_->NowTicks());
+
+  clock_->Advance(base::TimeDelta::FromMilliseconds(250));
+  // Make sure the throttled time domain's Now() reports the same as the
+  // underlying clock.
+  EXPECT_EQ(timer_queue_->GetTimeDomain()->Now(), clock_->NowTicks());
+}
+
 TEST_F(ThrottlingHelperTest, TaskQueueDisabledTillPump) {
   timer_queue_->PostTask(FROM_HERE, base::Bind(&NopTask));