chrome://profiler infrastructure uses base time types.

base/debug/task_annotator.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 "base/debug/task_annotator.h"
 
 #include <array>
 
 #include "base/debug/activity_tracker.h"
 #include "base/debug/alias.h"
@@ skipping 17 matching lines @@
                           TRACE_ID_MANGLE(GetTaskTraceID(pending_task)),
                           TRACE_EVENT_FLAG_FLOW_OUT);
 }
 
 void TaskAnnotator::RunTask(const char* queue_function,
                             PendingTask* pending_task) {
   ScopedTaskRunActivity task_activity(*pending_task);
 
   tracked_objects::TaskStopwatch stopwatch;
   stopwatch.Start();
-  tracked_objects::Duration queue_duration =
+  base::TimeDelta queue_duration =
       stopwatch.StartTime() - pending_task->EffectiveTimePosted();
 
   TRACE_EVENT_WITH_FLOW1(
       TRACE_DISABLED_BY_DEFAULT("toplevel.flow"), queue_function,
       TRACE_ID_MANGLE(GetTaskTraceID(*pending_task)), TRACE_EVENT_FLAG_FLOW_IN,
       "queue_duration", queue_duration.InMilliseconds());
 
   // Before running the task, store the task backtrace with the chain of
   // PostTasks that resulted in this call and deliberately alias it to ensure
   // it is on the stack if the task crashes. Be careful not to assume that the
@@ skipping 15 matching lines @@
 }
 
 uint64_t TaskAnnotator::GetTaskTraceID(const PendingTask& task) const {
   return (static_cast<uint64_t>(task.sequence_num) << 32) |
          ((static_cast<uint64_t>(reinterpret_cast<intptr_t>(this)) << 32) >>
           32);
 }
 
 }  // namespace debug
 }  // namespace base