chrome://profiler infrastructure uses base time types.

third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
index c8049df9e28d21d6afa4c554f4c522c4e5351a63..6f3a524bada7e4900ed1376ff4399d6e6963c17e 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
@@ -29,7 +29,7 @@ void RecordDelayedTaskLateness(base::TimeDelta lateness) {
                       lateness);
 }
 
-void RecordImmediateTaskQueueingDuration(tracked_objects::Duration duration) {
+void RecordImmediateTaskQueueingDuration(base::TimeDelta duration) {
   UMA_HISTOGRAM_TIMES(
       "RendererScheduler.TaskQueueManager.ImmediateTaskQueueingDuration",
       base::TimeDelta::FromMilliseconds(duration.InMilliseconds()));

[altimin, 2017/06/28 13:57:42]

nit: FromMilliseconds is not needed anymore.

[tdresser, 2017/06/28 15:37:33]

Whoops, thanks.

Done.

@@ -564,7 +564,7 @@ void TaskQueueManager::MaybeRecordTaskDelayHistograms(
     RecordDelayedTaskLateness(delegate_->NowTicks() -
                               pending_task.delayed_run_time);
   } else if (!pending_task.time_posted.is_null()) {
-    RecordImmediateTaskQueueingDuration(tracked_objects::TrackedTime::Now() -
+    RecordImmediateTaskQueueingDuration(base::TimeTicks::Now() -
                                         pending_task.time_posted);
   }
 }