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

base/test/test_simple_task_runner.h

Index: base/test/test_simple_task_runner.h
diff --git a/base/test/test_simple_task_runner.h b/base/test/test_simple_task_runner.h
index d089ba8a0bfacbe0cfbcec0bd64219a5b9cc6051..ac609f1f7f6a52b1c547059a6b438163a40a8722 100644
--- a/base/test/test_simple_task_runner.h
+++ b/base/test/test_simple_task_runner.h
@@ -7,6 +7,7 @@
 
 #include <deque>
 
+#include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
@@ -43,10 +44,10 @@ class TestSimpleTaskRunner : public SingleThreadTaskRunner {
 
   // SingleThreadTaskRunner implementation.
   bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       const Closure& task,
+                       Closure task,
                        TimeDelta delay) override;
   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
-                                  const Closure& task,
+                                  Closure task,
                                   TimeDelta delay) override;
 
   bool RunsTasksOnCurrentThread() const override;