base: Remove some unnecessary const scoped_refptr<>&.

base/threading/sequenced_worker_pool_unittest.cc

 // Copyright (c) 2012 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/threading/sequenced_worker_pool.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 57 matching lines @@
  private:
   base::Lock lock_;
   base::ConditionVariable cond_var_;
 
   size_t unblock_counter_;
 };
 
 class DestructionDeadlockChecker
     : public base::RefCountedThreadSafe<DestructionDeadlockChecker> {
  public:
-  explicit DestructionDeadlockChecker(
-      const scoped_refptr<SequencedWorkerPool>& pool)
-      : pool_(pool) {}
+  explicit DestructionDeadlockChecker(scoped_refptr<SequencedWorkerPool> pool)
+      : pool_(std::move(pool)) {}
 
  protected:
   virtual ~DestructionDeadlockChecker() {
     // This method should not deadlock.
     pool_->RunsTasksOnCurrentThread();
   }
 
  private:
   scoped_refptr<SequencedWorkerPool> pool_;
   friend class base::RefCountedThreadSafe<DestructionDeadlockChecker>;
@@ skipping 1068 matching lines @@
     SequencedWorkerPoolSequencedTaskRunner, SequencedTaskRunnerTest,
     SequencedWorkerPoolSequencedTaskRunnerTestDelegate);
 INSTANTIATE_TYPED_TEST_CASE_P(
     SequencedWorkerPoolSequencedTaskRunner,
     SequencedTaskRunnerDelayedTest,
     SequencedWorkerPoolSequencedTaskRunnerTestDelegate);
 
 }  // namespace
 
 }  // namespace base