Replace Closure in TaskRunner::PostTask with OneShotCallback

base/threading/worker_pool.h

Index: base/threading/worker_pool.h
diff --git a/base/threading/worker_pool.h b/base/threading/worker_pool.h
index a52a41428b31ce244930ddcb688bf2eb51f032cd..97d43bbb732267c576609db36461ea86742a98fe 100644
--- a/base/threading/worker_pool.h
+++ b/base/threading/worker_pool.h
@@ -34,14 +34,15 @@ class BASE_EXPORT WorkerPool {
   // false if |task| could not be posted to a worker thread.  Regardless of
   // return value, ownership of |task| is transferred to the worker pool.
   static bool PostTask(const tracked_objects::Location& from_here,
-                       const base::Closure& task, bool task_is_slow);
+                       OnceClosure task,
+                       bool task_is_slow);
 
   // Just like TaskRunner::PostTaskAndReply, except the destination
   // for |task| is a worker thread and you can specify |task_is_slow| just
   // like you can for PostTask above.
   static bool PostTaskAndReply(const tracked_objects::Location& from_here,
-                               const Closure& task,
-                               const Closure& reply,
+                               OnceClosure task,
+                               OnceClosure reply,
                                bool task_is_slow);
 
   // Return true if the current thread is one that this WorkerPool runs tasks