Creating a framework for suppressing pollution of the profiler data

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 dd1a393ab08633514df9d6d021a1be7ff4dbd23f..efc7397c37272b00ec979aaf8dc62b70264ec473 100644
--- a/base/message_loop/message_loop.cc
+++ b/base/message_loop/message_loop.cc
@@ -416,7 +416,9 @@ bool MessageLoop::ProcessNextDelayedNonNestableTask() {
 
 void MessageLoop::RunTask(const PendingTask& pending_task) {
   tracked_objects::TrackedTime start_time =
-      tracked_objects::ThreadData::NowForStartOfRun(pending_task.birth_tally);
+     tracked_objects::ThreadData::NowForStartOfRun(pending_task.birth_tally);
+  tracked_objects::TaskStopwatch stopwatch;
+  stopwatch.Start(start_time);
 
   TRACE_EVENT_FLOW_END1(TRACE_DISABLED_BY_DEFAULT("toplevel.flow"),
       "MessageLoop::PostTask", TRACE_ID_MANGLE(GetTaskTraceID(pending_task)),
@@ -451,8 +453,9 @@ void MessageLoop::RunTask(const PendingTask& pending_task) {
   FOR_EACH_OBSERVER(TaskObserver, task_observers_,
                     DidProcessTask(pending_task));
 
-  tracked_objects::ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
-      start_time, tracked_objects::ThreadData::NowForEndOfRun());
+  stopwatch.Stop(tracked_objects::ThreadData::NowForEndOfRun());
+  tracked_objects::ThreadData::TallyRunOnNamedThreadIfTracking(
+      pending_task, stopwatch);
 
   nestable_tasks_allowed_ = true;
 }