[scheduler] Add TaskQueue::Observer

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"
 #include "platform/scheduler/base/work_queue.h"
 
 namespace blink {
 namespace scheduler {
 
-TimeDomain::TimeDomain(Observer* observer) : observer_(observer) {}
+TimeDomain::TimeDomain() {}
 
 TimeDomain::~TimeDomain() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
 }
 
 void TimeDomain::RegisterQueue(internal::TaskQueueImpl* queue) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DCHECK_EQ(queue->GetTimeDomain(), this);
 }
 
@@ skipping 21 matching lines @@
   } else {
     // O(log n)
     delayed_wakeup_queue_.insert({wake_up, queue});
   }
 
   queue->set_scheduled_time_domain_wakeup(wake_up.time);
 
   // If |queue| is the first wakeup then request the wakeup.
   if (delayed_wakeup_queue_.min().queue == queue)
     RequestWakeupAt(now, wake_up.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;
 
@@ skipping 60 matching lines @@
   if (!delayed_wakeup_queue_.empty()) {
     base::TimeDelta delay = delayed_wakeup_queue_.min().wake_up.time - Now();
     state->SetDouble("next_delay_ms", delay.InMillisecondsF());
   }
   AsValueIntoInternal(state);
   state->EndDictionary();
 }
 
 }  // namespace scheduler
 }  // namespace blink