[scheduler] Always run task queue observer callback for delayed work.

third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
index 5d1479720bca21e8af8d31dd7ac21f94a2e89ab1..bc345ad2fc6667f82aadf043d8966aa52e17f1b8 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_impl.cc
@@ -890,10 +890,8 @@ void TaskQueueImpl::ScheduleDelayedWorkInTimeDomain(base::TimeTicks now) {
       this, main_thread_only().delayed_incoming_queue.top().delayed_wake_up(),
       now);
 
-  if (!HasPendingImmediateWork()) {
-    NotifyWakeUpChangedOnMainThread(
-        main_thread_only().delayed_incoming_queue.top().delayed_run_time);
-  }
+  NotifyWakeUpChangedOnMainThread(
+      main_thread_only().delayed_incoming_queue.top().delayed_run_time);
 }
 
 void TaskQueueImpl::NotifyWakeUpChangedOnMainThread(base::TimeTicks wake_up) {