Extract trace from TaskAnnotator::RunTask to its call sites

components/scheduler/child/task_queue_manager.cc

 // Copyright 2014 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 "components/scheduler/child/task_queue_manager.h"
 
 #include <queue>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 673 matching lines @@
   } else {
     // Suppress "will" task observer notifications for the first and "did"
     // notifications for the last task in the batch to avoid duplicate
     // notifications.
     if (has_previous_task) {
       FOR_EACH_OBSERVER(base::MessageLoop::TaskObserver, task_observers_,
                         DidProcessTask(*previous_task));
       FOR_EACH_OBSERVER(base::MessageLoop::TaskObserver, task_observers_,
                         WillProcessTask(pending_task));
     }
-    task_annotator_.RunTask("TaskQueueManager::PostTask",
-                            "TaskQueueManager::RunTask", pending_task);
+
+    TRACE_TASK_EXECUTION("TaskQueueManager::ProcessTaskFromWorkQueue",
+                         pending_task);
+    task_annotator_.RunTask("TaskQueueManager::PostTask", pending_task);
 
     // Detect if the TaskQueueManager just got deleted.  If this happens we must
     // not access any member variables after this point.
     if (protect->HasOneRef())
       return true;
 
     pending_task.task.Reset();
     *previous_task = pending_task;
   }
   return false;
@@ skipping 104 matching lines @@
       return nullptr;
   }
 }
 
 void TaskQueueManager::OnTaskQueueEnabled() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   MaybePostDoWorkOnMainRunner();
 }
 
 }  // namespace scheduler