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

base/task_runner.cc

Index: base/task_runner.cc
diff --git a/base/task_runner.cc b/base/task_runner.cc
index 35c0a23274a4fc7e72953912180d714ee6101826..8502510eb06a5d597e8e4dfd754ccd213c2b7d87 100644
--- a/base/task_runner.cc
+++ b/base/task_runner.cc
@@ -23,7 +23,7 @@ class PostTaskAndReplyTaskRunner : public internal::PostTaskAndReplyImpl {
 
  private:
   bool PostTask(const tracked_objects::Location& from_here,
-                const Closure& task) override;
+                Closure task) override;
 
   // Non-owning.
   TaskRunner* destination_;
@@ -36,15 +36,15 @@ PostTaskAndReplyTaskRunner::PostTaskAndReplyTaskRunner(
 
 bool PostTaskAndReplyTaskRunner::PostTask(
     const tracked_objects::Location& from_here,
-    const Closure& task) {
-  return destination_->PostTask(from_here, task);
+    Closure task) {
+  return destination_->PostTask(from_here, std::move(task));
 }
 
 }  // namespace
 
 bool TaskRunner::PostTask(const tracked_objects::Location& from_here,
-                          const Closure& task) {
-  return PostDelayedTask(from_here, task, base::TimeDelta());
+                          Closure task) {
+  return PostDelayedTask(from_here, std::move(task), base::TimeDelta());
 }
 
 bool TaskRunner::PostTaskAndReply(const tracked_objects::Location& from_here,