Revert of [tracing] Adding task information to heap profiler

base/threading/worker_pool_win.cc

Index: base/threading/worker_pool_win.cc
diff --git a/base/threading/worker_pool_win.cc b/base/threading/worker_pool_win.cc
index 575caaa6ba803079b4b37991de26026934682c0b..1b0ade5e244c9495570a126b00c080c53943a6ae 100644
--- a/base/threading/worker_pool_win.cc
+++ b/base/threading/worker_pool_win.cc
@@ -21,7 +21,9 @@
 
 DWORD CALLBACK WorkItemCallback(void* param) {
   PendingTask* pending_task = static_cast<PendingTask*>(param);
-  TRACE_TASK_EXECUTION("WorkerThread::ThreadMain::Run", *pending_task);
+  TRACE_EVENT2("toplevel", "WorkItemCallback::Run",
+               "src_file", pending_task->posted_from.file_name(),
+               "src_func", pending_task->posted_from.function_name());
 
   g_worker_pool_running_on_this_thread.Get().Set(true);