Adjust interfaces to indicate when tracking is in progress

base/message_loop.cc

 // Copyright (c) 2011 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/message_loop.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 473 matching lines @@
   // and deliberately alias it to ensure it is on the stack if the task
   // crashes. Be careful not to assume that the variable itself will have the
   // expected value when displayed by the optimizer in an optimized build.
   // Look at a memory dump of the stack.
   const void* program_counter =
       pending_task.posted_from.program_counter();
   base::debug::Alias(&program_counter);
 
   HistogramEvent(kTaskRunEvent);
 
-  tracked_objects::TrackedTime start_time = tracked_objects::ThreadData::Now();
+  tracked_objects::TrackedTime start_time =
+      tracked_objects::ThreadData::NowForStartOfRun();
 
   FOR_EACH_OBSERVER(TaskObserver, task_observers_,
                     WillProcessTask(pending_task.time_posted));
   pending_task.task.Run();
   FOR_EACH_OBSERVER(TaskObserver, task_observers_,
                     DidProcessTask(pending_task.time_posted));
 
   tracked_objects::ThreadData::TallyRunOnNamedThreadIfTracking(pending_task,
-      start_time, tracked_objects::ThreadData::Now());
+      start_time, tracked_objects::ThreadData::NowForEndOfRun());
 
   nestable_tasks_allowed_ = true;
 }
 
 bool MessageLoop::DeferOrRunPendingTask(const PendingTask& pending_task) {
   if (pending_task.nestable || state_->run_depth == 1) {
     RunTask(pending_task);
     // Show that we ran a task (Note: a new one might arrive as a
     // consequence!).
     return true;
@@ skipping 354 matching lines @@
                                            Watcher *delegate) {
   return pump_libevent()->WatchFileDescriptor(
       fd,
       persistent,
       static_cast<base::MessagePumpLibevent::Mode>(mode),
       controller,
       delegate);
 }
 
 #endif