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..99c52aaac9df16b02f8122a4e33d49a837cee774 100644
--- a/components/scheduler/renderer/throttling_helper_unittest.cc
+++ b/components/scheduler/renderer/throttling_helper_unittest.cc
@@ -330,34 +330,21 @@ TEST_F(ThrottlingHelperTest,
                   base::TimeTicks() + base::TimeDelta::FromSeconds(16)));
 }
 
-TEST_F(ThrottlingHelperTest, TaskDelayIsBasedOnRealTime) {
-  std::vector<base::TimeTicks> run_times;
-
-  throttling_helper_->IncreaseThrottleRefCount(timer_queue_.get());
+TEST_F(ThrottlingHelperTest, ThrottledTasksReportRealTimeToBlink) {
+  clock_->Advance(base::TimeDelta::FromSeconds(1));
 
-  // Post an initial task that should run at the first aligned time period.
-  timer_queue_->PostDelayedTask(FROM_HERE,
-                                base::Bind(&TestTask, &run_times, clock_.get()),
-                                base::TimeDelta::FromMilliseconds(900.0));
+  EXPECT_EQ(timer_queue_->GetTimeDomain()->BlinkNow(), clock_->NowTicks());
 
-  mock_task_runner_->RunUntilIdle();
+  throttling_helper_->IncreaseThrottleRefCount(timer_queue_.get());
+  // Note the throttled time domain's view of time is usally in the past.
+  EXPECT_LT(timer_queue_->GetTimeDomain()->Now(), clock_->NowTicks());
+  // But we report the current real time to blink.
+  EXPECT_EQ(timer_queue_->GetTimeDomain()->BlinkNow(), clock_->NowTicks());
 
-  // Advance realtime.
+  // Advance realtime, and make sure BlinkNow advances too.
   clock_->Advance(base::TimeDelta::FromMilliseconds(250));
-
-  // Post a task that due to real time + delay must run in the third aligned
-  // time period.
-  timer_queue_->PostDelayedTask(FROM_HERE,
-                                base::Bind(&TestTask, &run_times, clock_.get()),
-                                base::TimeDelta::FromMilliseconds(900.0));
-
-  mock_task_runner_->RunUntilIdle();
-
-  EXPECT_THAT(
-      run_times,
-      ElementsAre(
-          base::TimeTicks() + base::TimeDelta::FromMilliseconds(1000.0),
-          base::TimeTicks() + base::TimeDelta::FromMilliseconds(3000.0)));
+  EXPECT_LT(timer_queue_->GetTimeDomain()->Now(), clock_->NowTicks());
+  EXPECT_EQ(timer_queue_->GetTimeDomain()->BlinkNow(), clock_->NowTicks());
 }
 
 TEST_F(ThrottlingHelperTest, TaskQueueDisabledTillPump) {