base: Remove some unnecessary const scoped_refptr<>&.

base/deferred_sequenced_task_runner.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/deferred_sequenced_task_runner.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 
 namespace base {
 
 DeferredSequencedTaskRunner::DeferredTask::DeferredTask()
     : is_non_nestable(false) {
 }
 
 DeferredSequencedTaskRunner::DeferredTask::DeferredTask(
     const DeferredTask& other) = default;
 
 DeferredSequencedTaskRunner::DeferredTask::~DeferredTask() {
 }
 
 DeferredSequencedTaskRunner::DeferredSequencedTaskRunner(
-    const scoped_refptr<SequencedTaskRunner>& target_task_runner)
-    : started_(false),
-      target_task_runner_(target_task_runner) {
-}
+    scoped_refptr<SequencedTaskRunner> target_task_runner)
+    : started_(false), target_task_runner_(std::move(target_task_runner)) {}
 
 DeferredSequencedTaskRunner::~DeferredSequencedTaskRunner() {
 }
 
 bool DeferredSequencedTaskRunner::PostDelayedTask(
     const tracked_objects::Location& from_here,
     const Closure& task,
     TimeDelta delay) {
   AutoLock lock(lock_);
   if (started_) {
@@ skipping 57 matching lines @@
     }
     // Replace the i-th element in the |deferred_tasks_queue_| with an empty
     // |DelayedTask| to ensure that |task| is destroyed before the next task
     // is posted.
     *i = DeferredTask();
   }
   deferred_tasks_queue_.clear();
 }
 
 }  // namespace base