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

base/test/test_mock_time_task_runner.h

Index: base/test/test_mock_time_task_runner.h
diff --git a/base/test/test_mock_time_task_runner.h b/base/test/test_mock_time_task_runner.h
index 54ebbdb7a8d6b637ea3d0de64b2f3af138bda0ab..5c61a36f6973342f8d723c890b7ec81be22d5c29 100644
--- a/base/test/test_mock_time_task_runner.h
+++ b/base/test/test_mock_time_task_runner.h
@@ -12,6 +12,7 @@
 #include <queue>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
@@ -140,10 +141,10 @@ class TestMockTimeTaskRunner : public SingleThreadTaskRunner {
   // SingleThreadTaskRunner:
   bool RunsTasksOnCurrentThread() const override;
   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;
 
  protected: