Revert 107895 - Fully enable about:tracking by default

base/threading/worker_pool_posix.cc

Index: base/threading/worker_pool_posix.cc
===================================================================
--- base/threading/worker_pool_posix.cc	(revision 107960)
+++ base/threading/worker_pool_posix.cc	(working copy)
@@ -88,14 +88,15 @@
         "src_file", pending_task.posted_from.file_name(),
         "src_func", pending_task.posted_from.function_name());
 
-    tracked_objects::TrackedTime start_time =
-        tracked_objects::ThreadData::Now();
-
+#if defined(TRACK_ALL_TASK_OBJECTS)
+    TimeTicks start_of_run = tracked_objects::ThreadData::Now();
+#endif  // defined(TRACK_ALL_TASK_OBJECTS)
     pending_task.task.Run();
-
-    tracked_objects::ThreadData::TallyRunOnWorkerThreadIfTracking(
-        pending_task.birth_tally, pending_task.time_posted,
-        start_time, tracked_objects::ThreadData::Now());
+#if defined(TRACK_ALL_TASK_OBJECTS)
+    tracked_objects::ThreadData::TallyADeathIfActive(pending_task.post_births,
+        pending_task.time_posted, TimeTicks(), start_of_run,
+        tracked_objects::ThreadData::Now());
+#endif  // defined(TRACK_ALL_TASK_OBJECTS)
   }
 
   // The WorkerThread is non-joinable, so it deletes itself.
@@ -121,8 +122,10 @@
     const base::Closure& task)
     : posted_from(posted_from),
       task(task) {
-  birth_tally = tracked_objects::ThreadData::TallyABirthIfActive(posted_from);
+#if defined(TRACK_ALL_TASK_OBJECTS)
+  post_births = tracked_objects::ThreadData::TallyABirthIfActive(posted_from);
   time_posted = tracked_objects::ThreadData::Now();
+#endif  // defined(TRACK_ALL_TASK_OBJECTS)
 }
 
 PosixDynamicThreadPool::PendingTask::~PendingTask() {