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

base/message_loop/message_loop_task_runner.cc

Index: base/message_loop/message_loop_task_runner.cc
diff --git a/base/message_loop/message_loop_task_runner.cc b/base/message_loop/message_loop_task_runner.cc
index c9b5ffe3f739d0bdb312f3ac3d6d6de8e4adf580..ddfdeb2b65b5dbf337edcf35457877ed38b2993e 100644
--- a/base/message_loop/message_loop_task_runner.cc
+++ b/base/message_loop/message_loop_task_runner.cc
@@ -4,6 +4,8 @@
 
 #include "base/message_loop/message_loop_task_runner.h"
 
+#include <utility>
+
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/incoming_task_queue.h"
@@ -24,18 +26,20 @@ void MessageLoopTaskRunner::BindToCurrentThread() {
 
 bool MessageLoopTaskRunner::PostDelayedTask(
     const tracked_objects::Location& from_here,
-    const base::Closure& task,
+    Closure task,
     base::TimeDelta delay) {
   DCHECK(!task.is_null()) << from_here.ToString();
-  return incoming_queue_->AddToIncomingQueue(from_here, task, delay, true);
+  return incoming_queue_->AddToIncomingQueue(from_here, std::move(task), delay,
+                                             true);
 }
 
 bool MessageLoopTaskRunner::PostNonNestableDelayedTask(
     const tracked_objects::Location& from_here,
-    const base::Closure& task,
+    Closure task,
     base::TimeDelta delay) {
   DCHECK(!task.is_null()) << from_here.ToString();
-  return incoming_queue_->AddToIncomingQueue(from_here, task, delay, false);
+  return incoming_queue_->AddToIncomingQueue(from_here, std::move(task), delay,
+                                             false);
 }
 
 bool MessageLoopTaskRunner::RunsTasksOnCurrentThread() const {