Replace base::Callback with base::OnceCallback in base::PendingTask

base/task_scheduler/task_tracker.cc

 // Copyright 2016 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/task_scheduler/task_tracker.h"
 
 #include <limits>
 
 #include "base/callback.h"
 #include "base/debug/task_annotator.h"
@@ skipping 237 matching lines @@
               : (task->sequenced_task_runner_ref ? ExecutionMode::SEQUENCED
                                                  : ExecutionMode::PARALLEL);
       // TODO(gab): In a better world this would be tacked on as an extra arg
       // to the trace event generated above. This is not possible however until
       // http://crbug.com/652692 is resolved.
       TRACE_EVENT1("task_scheduler", "TaskTracker::RunTask", "task_info",
                    MakeUnique<TaskTracingInfo>(task->traits, execution_mode,
                                                sequence_token));
 
       debug::TaskAnnotator task_annotator;
-      task_annotator.RunTask(kQueueFunctionName, *task);
+      task_annotator.RunTask(kQueueFunctionName, task.get());
     }
 
     AfterRunTask(shutdown_behavior);
   }
 
   if (task->delayed_run_time.is_null())
     DecrementNumPendingUndelayedTasks();
 
   return can_run_task;
 }
@@ skipping 166 matching lines @@
       subtle::NoBarrier_AtomicIncrement(&num_pending_undelayed_tasks_, -1);
   DCHECK_GE(new_num_pending_undelayed_tasks, 0);
   if (new_num_pending_undelayed_tasks == 0) {
     AutoSchedulerLock auto_lock(flush_lock_);
     flush_cv_->Signal();
   }
 }
 
 }  // namespace internal
 }  // namespace base