Pass Callback by value on PostTaskAndReply family

base/task_runner.h

Index: base/task_runner.h
diff --git a/base/task_runner.h b/base/task_runner.h
index 9593835eebbdfa51f43e1d236f387f3ee1ac7940..be3039d3723b95b4f574823141ad31bc74618250 100644
--- a/base/task_runner.h
+++ b/base/task_runner.h
@@ -8,7 +8,7 @@
 #include <stddef.h>
 
 #include "base/base_export.h"
-#include "base/callback_forward.h"
+#include "base/callback.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
@@ -123,8 +123,8 @@ class BASE_EXPORT TaskRunner
   //     and the reply will cancel itself safely because it is bound to a
   //     WeakPtr<>.
   bool PostTaskAndReply(const tracked_objects::Location& from_here,
-                        const Closure& task,
-                        const Closure& reply);
+                        Closure task,
+                        Closure reply);
 
  protected:
   friend struct TaskRunnerTraits;