Rewrite base::Bind into base::BindOnce on trivial cases in base

base/task_scheduler/delayed_task_manager.cc

Index: base/task_scheduler/delayed_task_manager.cc
diff --git a/base/task_scheduler/delayed_task_manager.cc b/base/task_scheduler/delayed_task_manager.cc
index 420f8937f8bac38d0a99b21961f672964978dfa6..570ffcc8cb3abf142ecb40be376c45561c1d722a 100644
--- a/base/task_scheduler/delayed_task_manager.cc
+++ b/base/task_scheduler/delayed_task_manager.cc
@@ -34,7 +34,8 @@ void DelayedTaskManager::AddDelayedTask(
   // TODO(fdoray): Use |task->delayed_run_time| on the service thread
   // MessageLoop rather than recomputing it from |delay|.
   service_thread_task_runner_->PostDelayedTask(
-      FROM_HERE, Bind(post_task_now_callback, Passed(std::move(task))), delay);
+      FROM_HERE, BindOnce(post_task_now_callback, Passed(std::move(task))),
+      delay);
 }
 
 }  // namespace internal