Replace Closure in TaskRunner::PostTask with OneShotCallback

base/task_scheduler/post_task.h

Index: base/task_scheduler/post_task.h
diff --git a/base/task_scheduler/post_task.h b/base/task_scheduler/post_task.h
index a7a2114efb7b30f07e8ed3d2ede92de169327514..dd97fceeaa40dd9d849000f8378133deca7aa18c 100644
--- a/base/task_scheduler/post_task.h
+++ b/base/task_scheduler/post_task.h
@@ -59,7 +59,7 @@ namespace base {
 // 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
@@ -67,13 +67,13 @@ BASE_EXPORT void PostTask(const tracked_objects::Location& from_here,
 // 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
@@ -82,8 +82,8 @@ BASE_EXPORT void PostTaskWithTraits(const tracked_objects::Location& from_here,
 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|.