Revert 221427 "Add instrumentation to the MessagePumpMac family ..."

base/message_loop/message_loop.cc

Index: base/message_loop/message_loop.cc
diff --git a/base/message_loop/message_loop.cc b/base/message_loop/message_loop.cc
index ccece4d38ca1d4acb3d9810b9eb7ba9d646a58a4..8e817dab8adece6ff025f277167901d6babdeab4 100644
--- a/base/message_loop/message_loop.cc
+++ b/base/message_loop/message_loop.cc
@@ -632,20 +632,6 @@ bool MessageLoop::DoIdleWork() {
   return false;
 }
 
-void MessageLoop::GetQueueingInformation(size_t* queue_size,
-                                         TimeDelta* queueing_delay) {
-  *queue_size = work_queue_.size();
-  if (*queue_size == 0) {
-    *queueing_delay = TimeDelta();
-    return;
-  }
-
-  const PendingTask& next_to_run = work_queue_.front();
-  tracked_objects::Duration duration =
-      tracked_objects::TrackedTime::Now() - next_to_run.EffectiveTimePosted();
-  *queueing_delay = TimeDelta::FromMilliseconds(duration.InMilliseconds());
-}
-
 void MessageLoop::DeleteSoonInternal(const tracked_objects::Location& from_here,
                                      void(*deleter)(const void*),
                                      const void* object) {