Replace Closure in TaskRunner::PostTask with OneShotCallback

base/test/test_pending_task.h

Index: base/test/test_pending_task.h
diff --git a/base/test/test_pending_task.h b/base/test/test_pending_task.h
index 2dbdb7eeccbdcc1927dca53114258f83eb06e477..c8fdea39560c6a3ec1972b6bf8bcd8b5786380d1 100644
--- a/base/test/test_pending_task.h
+++ b/base/test/test_pending_task.h
@@ -21,13 +21,14 @@ struct TestPendingTask {
   enum TestNestability { NESTABLE, NON_NESTABLE };
 
   TestPendingTask();
-  TestPendingTask(const TestPendingTask& other);
+  TestPendingTask(TestPendingTask&& other);
   TestPendingTask(const tracked_objects::Location& location,
-                  const Closure& task,
+                  OnceClosure task,
                   TimeTicks post_time,
                   TimeDelta delay,
                   TestNestability nestability);
   ~TestPendingTask();
+  TestPendingTask& operator=(TestPendingTask&& other);
 
   // Returns post_time + delay.
   TimeTicks GetTimeToRun() const;
@@ -51,7 +52,7 @@ struct TestPendingTask {
   bool ShouldRunBefore(const TestPendingTask& other) const;
 
   tracked_objects::Location location;
-  Closure task;
+  mutable OnceClosure task;
   TimeTicks post_time;
   TimeDelta delay;
   TestNestability nestability;