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..d409fcf8f7e411d7bbf53e1ae2e8fde7d75294bf 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
@@ -29,10 +29,10 @@ 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()));
+      duration);
 }
 
 double MonotonicTimeInSeconds(base::TimeTicks time_ticks) {
@@ -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);
   }
 }