tracing: Make ConvertableToTraceFormat move-only scoped_ptr

components/scheduler/base/task_queue_manager.cc

 // Copyright 2014 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/task_queue_manager.h"
 
 #include <queue>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 348 matching lines @@
 }
 
 internal::EnqueueOrder TaskQueueManager::GetNextSequenceNumber() {
   return enqueue_order_generator_.GenerateNext();
 }
 
 LazyNow TaskQueueManager::CreateLazyNow() const {
   return LazyNow(delegate_.get());
 }
 
-scoped_refptr<base::trace_event::ConvertableToTraceFormat>
+scoped_ptr<base::trace_event::ConvertableToTraceFormat>
 TaskQueueManager::AsValueWithSelectorResult(
     bool should_run,
     internal::WorkQueue* selected_work_queue) const {
   DCHECK(main_thread_checker_.CalledOnValidThread());
-  scoped_refptr<base::trace_event::TracedValue> state =
-      new base::trace_event::TracedValue();
+  scoped_ptr<base::trace_event::TracedValue> state(
+      new base::trace_event::TracedValue());
   state->BeginArray("queues");
   for (auto& queue : queues_)
     queue->AsValueInto(state.get());
   state->EndArray();
   state->BeginDictionary("selector");
   selector_.AsValueInto(state.get());
   state->EndDictionary();
   if (should_run) {
     state->SetString("selected_queue",
                      selected_work_queue->task_queue()->GetName());
     state->SetString("work_queue_name", selected_work_queue->name());
   }
 
   state->BeginArray("time_domains");
   for (auto& time_domain : time_domains_)
     time_domain->AsValueInto(state.get());
   state->EndArray();
-  return state;
+  return std::move(state);
 }
 
 void TaskQueueManager::OnTaskQueueEnabled(internal::TaskQueueImpl* queue) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   // Only schedule DoWork if there's something to do.
   if (!queue->immediate_work_queue()->Empty() ||
       !queue->delayed_work_queue()->Empty()) {
     MaybeScheduleImmediateWork(FROM_HERE);
   }
 }
 
 void TaskQueueManager::OnTriedToSelectBlockedWorkQueue(
     internal::WorkQueue* work_queue) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   DCHECK(!work_queue->Empty());
   if (observer_) {
     observer_->OnTriedToExecuteBlockedTask(*work_queue->task_queue(),
                                            *work_queue->GetFrontTask());
   }
 }
 
 }  // namespace scheduler