Use TaskScheduler instead of SequencedWorkerPool in task_manager_impl.cc.

chrome/browser/task_manager/sampling/task_manager_impl.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 "chrome/browser/task_manager/sampling/task_manager_impl.h"
 
 #include <algorithm>
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
 
 #include "base/containers/adapters.h"
-#include "base/threading/sequenced_worker_pool.h"
+#include "base/task_scheduler/post_task.h"
 #include "build/build_config.h"
 #include "chrome/browser/task_manager/providers/browser_process_task_provider.h"
 #include "chrome/browser/task_manager/providers/child_process_task_provider.h"
 #include "chrome/browser/task_manager/providers/web_contents/web_contents_task_provider.h"
 #include "chrome/browser/task_manager/sampling/shared_sampler.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/task_manager/providers/arc/arc_process_task_provider.h"
 #include "components/arc/arc_util.h"
 #endif  // defined(OS_CHROMEOS)
 
 namespace task_manager {
 
 namespace {
 
-scoped_refptr<base::SequencedTaskRunner> GetBlockingPoolRunner() {
-  base::SequencedWorkerPool* blocking_pool =
-      content::BrowserThread::GetBlockingPool();
-  return blocking_pool->GetSequencedTaskRunner(
-      blocking_pool->GetSequenceToken());
-}
-
 base::LazyInstance<TaskManagerImpl>::DestructorAtExit
     lazy_task_manager_instance = LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 TaskManagerImpl::TaskManagerImpl()
     : on_background_data_ready_callback_(
           base::Bind(&TaskManagerImpl::OnTaskGroupBackgroundCalculationsDone,
                      base::Unretained(this))),
-      blocking_pool_runner_(GetBlockingPoolRunner()),
+      blocking_pool_runner_(base::CreateSequencedTaskRunnerWithTraits(
+          {base::MayBlock(), base::TaskPriority::BACKGROUND,
+           base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN})),
       shared_sampler_(new SharedSampler(blocking_pool_runner_)),
       is_running_(false),
       weak_ptr_factory_(this) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   task_providers_.emplace_back(new BrowserProcessTaskProvider());
   task_providers_.emplace_back(new ChildProcessTaskProvider());
   task_providers_.emplace_back(new WebContentsTaskProvider());
 #if defined(OS_CHROMEOS)
   if (arc::IsArcAvailable())
@@ skipping 505 matching lines @@
         groups_itr.second->AreBackgroundCalculationsDone();
   }
   if (are_all_processes_data_ready) {
     NotifyObserversOnRefreshWithBackgroundCalculations(GetTaskIdsList());
     for (const auto& groups_itr : task_groups_by_proc_id_)
       groups_itr.second->ClearCurrentBackgroundCalculationsFlags();
   }
 }
 
 }  // namespace task_manager