Make PendingTask move-only and pass it by value on retaining params

components/scheduler/base/task_queue_manager.cc

Index: components/scheduler/base/task_queue_manager.cc
diff --git a/components/scheduler/base/task_queue_manager.cc b/components/scheduler/base/task_queue_manager.cc
index 36f08de540fe8529ab593f6248504b0d23561795..3bdf893840033759e4b54633a2257827a55c9308 100644
--- a/components/scheduler/base/task_queue_manager.cc
+++ b/components/scheduler/base/task_queue_manager.cc
@@ -304,7 +304,7 @@ TaskQueueManager::ProcessTaskResult TaskQueueManager::ProcessTaskFromWorkQueue(
   }
 
   pending_task.task.Reset();
-  *out_previous_task = pending_task;
+  *out_previous_task = std::move(pending_task);
   return ProcessTaskResult::EXECUTED;
 }