Report expected task queueing time via UMA

components/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 "components/scheduler/base/time_domain.h"
 
 #include <set>
 
 #include "components/scheduler/base/task_queue_impl.h"
 #include "components/scheduler/base/task_queue_manager_delegate.h"
@@ skipping 92 matching lines @@
       newly_updatable_[i] = newly_updatable_.back();
       newly_updatable_.pop_back();
     } else {
       i++;
     }
   }
 }
 
 void TimeDomain::UpdateWorkQueues(
     bool should_trigger_wakeup,
-    const internal::TaskQueueImpl::Task* previous_task) {
+    const internal::TaskQueueImpl::Task* previous_task,
+    LazyNow lazy_now) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
-  LazyNow lazy_now(CreateLazyNow());
 
   // Move any ready delayed tasks into the Incoming queues.
   WakeupReadyDelayedQueues(&lazy_now, should_trigger_wakeup, previous_task);
 
   MoveNewlyUpdatableQueuesIntoUpdatableQueueSet();
 
   auto iter = updatable_queue_set_.begin();
   while (iter != updatable_queue_set_.end()) {
     internal::TaskQueueImpl* queue = *iter++;
     // NOTE Update work queue may erase itself from |updatable_queue_set_|.
@@ skipping 80 matching lines @@
   state->SetInteger("registered_delay_count", delayed_wakeup_multimap_.size());
   if (!delayed_wakeup_multimap_.empty()) {
     base::TimeDelta delay = delayed_wakeup_multimap_.begin()->first - Now();
     state->SetDouble("next_delay_ms", delay.InMillisecondsF());
   }
   AsValueIntoInternal(state);
   state->EndDictionary();
 }
 
 }  // namespace scheduler