Replace Closure in TaskRunner::PostTask with OneShotCallback

base/message_loop/message_loop.h

Index: base/message_loop/message_loop.h
diff --git a/base/message_loop/message_loop.h b/base/message_loop/message_loop.h
index 1957b99d74648fc9f8abb1658e3ef59c25357838..7deb35332775f3c816f75f28982e14d2782f7945 100644
--- a/base/message_loop/message_loop.h
+++ b/base/message_loop/message_loop.h
@@ -205,10 +205,10 @@ class BASE_EXPORT MessageLoop : public MessagePump::Delegate {
   // NOTE: These methods may be called on any thread.  The Task will be invoked
   // on the thread that executes MessageLoop::Run().
   void PostTask(const tracked_objects::Location& from_here,
-                const Closure& task);
+                OnceClosure task);
 
   void PostDelayedTask(const tracked_objects::Location& from_here,
-                       const Closure& task,
+                       OnceClosure task,
                        TimeDelta delay);
 
   // A variant on PostTask that deletes the given object.  This is useful
@@ -410,7 +410,7 @@ class BASE_EXPORT MessageLoop : public MessagePump::Delegate {
   debug::TaskAnnotator* task_annotator() { return &task_annotator_; }
 
   // Runs the specified PendingTask.
-  void RunTask(const PendingTask& pending_task);
+  void RunTask(PendingTask pending_task);
 
 #if defined(OS_WIN)
   // TODO (stanisc): crbug.com/596190: Remove this after the signaling issue