Replace Closure in TaskRunner::PostTask with OneShotCallback

base/task_scheduler/post_task.h

 // 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.
 
 #ifndef BASE_TASK_SCHEDULER_POST_TASK_H_
 #define BASE_TASK_SCHEDULER_POST_TASK_H_
 
 #include "base/base_export.h"
 #include "base/callback_forward.h"
 #include "base/location.h"
@@ skipping 41 matching lines @@
 //     (2) don't affect user interaction and/or visible elements, and
 //     (3) can either block shutdown or be skipped on shutdown
 //         (barring current TaskScheduler default).
 // If those loose requirements are sufficient for your task, use
 // PostTask[AndReply], otherwise override these with explicit traits via
 // PostTaskWithTraits[AndReply].
 
 // Posts |task| to the TaskScheduler. Calling this is equivalent to calling
 // PostTaskWithTraits with plain TaskTraits.
 BASE_EXPORT void PostTask(const tracked_objects::Location& from_here,
-                          const Closure& task);
+                          OnceClosure task);
 
 // Posts |task| to the TaskScheduler and posts |reply| on the caller's execution
 // context (i.e. same sequence or thread and same TaskTraits if applicable) when
 // |task| completes. Calling this is equivalent to calling
 // PostTaskWithTraitsAndReply with plain TaskTraits. Can only be called when
 // SequencedTaskRunnerHandle::IsSet().
 BASE_EXPORT void PostTaskAndReply(const tracked_objects::Location& from_here,
-                                  const Closure& task,
-                                  const Closure& reply);
+                                  OnceClosure task,
+                                  OnceClosure reply);
 
 // Posts |task| with specific |traits| to the TaskScheduler.
 BASE_EXPORT void PostTaskWithTraits(const tracked_objects::Location& from_here,
                                     TaskTraits traits,
-                                    const Closure& task);
+                                    OnceClosure task);
 
 // Posts |task| with specific |traits| to the TaskScheduler and posts |reply| on
 // the caller's execution context (i.e. same sequence or thread and same
 // TaskTraits if applicable) when |task| completes. Can only be called when
 // SequencedTaskRunnerHandle::IsSet().
 BASE_EXPORT void PostTaskWithTraitsAndReply(
     const tracked_objects::Location& from_here,
     TaskTraits traits,
-    const Closure& task,
-    const Closure& reply);
+    OnceClosure task,
+    OnceClosure reply);
 
 // Returns a TaskRunner whose PostTask invocations will result in scheduling
 // tasks using |traits| which will be executed according to |execution_mode|.
 BASE_EXPORT scoped_refptr<TaskRunner> CreateTaskRunnerWithTraits(
     TaskTraits traits,
     ExecutionMode execution_mode);
 
 }  // namespace base
 
 #endif  // BASE_TASK_SCHEDULER_POST_TASK_H_