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

base/test/null_task_runner.cc

Index: base/test/null_task_runner.cc
diff --git a/base/test/null_task_runner.cc b/base/test/null_task_runner.cc
index ffa6bdf043b4d1fae4015d3e13d0458f5ec6de90..66bdf6ffbde321508d98c1d157536fceb88c9318 100644
--- a/base/test/null_task_runner.cc
+++ b/base/test/null_task_runner.cc
@@ -10,16 +10,15 @@ NullTaskRunner::NullTaskRunner() {}
 
 NullTaskRunner::~NullTaskRunner() {}
 
-bool NullTaskRunner::PostDelayedTask(
-    const tracked_objects::Location& from_here,
-    const base::Closure& task,
-    base::TimeDelta delay) {
+bool NullTaskRunner::PostDelayedTask(const tracked_objects::Location& from_here,
+                                     Closure task,
+                                     base::TimeDelta delay) {
   return false;
 }
 
 bool NullTaskRunner::PostNonNestableDelayedTask(
     const tracked_objects::Location& from_here,
-    const base::Closure& task,
+    Closure task,
     base::TimeDelta delay) {
   return false;
 }