[Reland] Dont post delayed DoWork for disabled queues.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/scheduler/base/time_domain.h"
 
 #include <set>
 
 #include "platform/scheduler/base/task_queue_impl.h"
 #include "platform/scheduler/base/task_queue_manager_delegate.h"
@@ skipping 15 matching lines @@
 
 void TimeDomain::UnregisterQueue(internal::TaskQueueImpl* queue) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DCHECK_EQ(queue->GetTimeDomain(), this);
 
   CancelDelayedWork(queue);
 }
 
 void TimeDomain::ScheduleDelayedWork(internal::TaskQueueImpl* queue,
                                      base::TimeTicks delayed_run_time,
-                                     base::TimeTicks now) {
+                                     LazyNow* lazy_now) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DCHECK_EQ(queue->GetTimeDomain(), this);
   // We only want to store a single wakeup per queue, so we need to remove any
   // previously registered wake up for |queue|.
   if (queue->heap_handle().IsValid()) {
     DCHECK_NE(queue->scheduled_time_domain_wakeup(), base::TimeTicks());
 
     // O(log n)
     delayed_wakeup_queue_.ChangeKey(queue->heap_handle(),
                                     {delayed_run_time, queue});
   } else {
     // O(log n)
     delayed_wakeup_queue_.insert({delayed_run_time, queue});
   }
 
   queue->set_scheduled_time_domain_wakeup(delayed_run_time);
 
   // If |queue| is the first wakeup then request the wakeup.
-  if (delayed_wakeup_queue_.min().queue == queue) {
-    base::TimeDelta delay = std::max(base::TimeDelta(), delayed_run_time - now);
-    RequestWakeup(now, delay);
-  }
+  if (delayed_wakeup_queue_.min().queue == queue)
+    RequestWakeupAt(lazy_now, delayed_run_time);
 
   if (observer_)
     observer_->OnTimeDomainHasDelayedWork(queue);
 }
 
 void TimeDomain::OnQueueHasImmediateWork(internal::TaskQueueImpl* queue) {
   if (observer_)
     observer_->OnTimeDomainHasImmediateWork(queue);
 }
 
 void TimeDomain::CancelDelayedWork(internal::TaskQueueImpl* queue) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DCHECK_EQ(queue->GetTimeDomain(), this);
 
   // If no wakeup has been requested then bail out.
   if (!queue->heap_handle().IsValid())
     return;
 
   DCHECK_NE(queue->scheduled_time_domain_wakeup(), base::TimeTicks());
+  DCHECK(!delayed_wakeup_queue_.empty());
+  base::TimeTicks prev_first_wakeup = delayed_wakeup_queue_.min().time;
 
   // O(log n)
   delayed_wakeup_queue_.erase(queue->heap_handle());
+
+  if (delayed_wakeup_queue_.empty()) {
+    CancelWakeupAt(prev_first_wakeup);
+  } else if (prev_first_wakeup != delayed_wakeup_queue_.min().time) {
+    LazyNow lazy_now = CreateLazyNow();
+    CancelWakeupAt(prev_first_wakeup);
+    RequestWakeupAt(&lazy_now, delayed_wakeup_queue_.min().time);
+  }
 }
 
 void TimeDomain::WakeupReadyDelayedQueues(LazyNow* lazy_now) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   // Wake up any queues with pending delayed work.  Note std::multipmap stores
   // the elements sorted by key, so the begin() iterator points to the earliest
   // queue to wakeup.
   while (!delayed_wakeup_queue_.empty() &&
          delayed_wakeup_queue_.min().time <= lazy_now->Now()) {
     internal::TaskQueueImpl* queue = delayed_wakeup_queue_.min().queue;
@@ skipping 37 matching lines @@
   if (!delayed_wakeup_queue_.empty()) {
     base::TimeDelta delay = delayed_wakeup_queue_.min().time - Now();
     state->SetDouble("next_delay_ms", delay.InMillisecondsF());
   }
   AsValueIntoInternal(state);
   state->EndDictionary();
 }
 
 }  // namespace scheduler
 }  // namespace blink