Replace Closure in TaskRunner::PostTask with OneShotCallback

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/atomicops.h"
 #include "base/callback.h"
@@ skipping 173 matching lines @@
 
   if (!BeforePostTask(task->traits.shutdown_behavior()))
     return false;
 
   debug::TaskAnnotator task_annotator;
   task_annotator.DidQueueTask(kQueueFunctionName, *task);
 
   return true;
 }
 
-bool TaskTracker::RunTask(const Task* task,
+bool TaskTracker::RunTask(Task* task,
                           const SequenceToken& sequence_token) {
   DCHECK(task);
   DCHECK(sequence_token.IsValid());
 
   const TaskShutdownBehavior shutdown_behavior =
       task->traits.shutdown_behavior();
   if (!BeforeRunTask(shutdown_behavior))
     return false;
 
   // All tasks run through here and the scheduler itself doesn't use singletons.
@@ skipping 17 matching lines @@
       sequenced_task_runner_handle.reset(
           new SequencedTaskRunnerHandle(task->sequenced_task_runner_ref));
     } else if (task->single_thread_task_runner_ref) {
       single_thread_task_runner_handle.reset(
           new ThreadTaskRunnerHandle(task->single_thread_task_runner_ref));
     }
 
     TRACE_TASK_EXECUTION(kRunFunctionName, *task);
 
     debug::TaskAnnotator task_annotator;
-    task_annotator.RunTask(kQueueFunctionName, *task);
+    task_annotator.RunTask(kQueueFunctionName, task);
   }
 
   AfterRunTask(shutdown_behavior);
 
   return true;
 }
 
 bool TaskTracker::HasShutdownStarted() const {
   return state_->HasShutdownStarted();
 }
@@ skipping 101 matching lines @@
 
   // This method can only be called after shutdown has started.
   DCHECK(state_->HasShutdownStarted());
   DCHECK(shutdown_event_);
 
   shutdown_event_->Signal();
 }
 
 }  // namespace internal
 }  // namespace base