Reland of [tracing] Adding task information to heap profiler

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"
 #include "base/metrics/histogram_macros.h"
+#include "base/trace_event/trace_event.h"
 #include "components/scheduler/base/real_time_domain.h"
 #include "components/scheduler/base/task_queue_impl.h"
 #include "components/scheduler/base/task_queue_manager_delegate.h"
 #include "components/scheduler/base/task_queue_selector.h"
 #include "components/scheduler/base/work_queue.h"
 #include "components/scheduler/base/work_queue_sets.h"
 
 namespace scheduler {
 
 namespace {
@@ skipping 384 matching lines @@
     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