Pass Callback to TaskRunner by value and consume it on invocation (1)

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 865948e437e7e0832909680c98bb82ff5ad0707c..d97dbd6a69e77070e542eb792f33a467643874d3 100644
--- a/base/threading/worker_pool.h
+++ b/base/threading/worker_pool.h
@@ -32,7 +32,8 @@ 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);
+                       Closure 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