Require explicit selection of traits for LazyInstance

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>
@@ skipping 21 matching lines @@
 
 namespace {
 
 scoped_refptr<base::SequencedTaskRunner> GetBlockingPoolRunner() {
   base::SequencedWorkerPool* blocking_pool =
       content::BrowserThread::GetBlockingPool();
   return blocking_pool->GetSequencedTaskRunner(
       blocking_pool->GetSequenceToken());
 }
 
-base::LazyInstance<TaskManagerImpl> lazy_task_manager_instance =
-    LAZY_INSTANCE_INITIALIZER;
+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()),
       shared_sampler_(new SharedSampler(blocking_pool_runner_)),
       is_running_(false) {
@@ skipping 514 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