Move base to DEPS

base/sequence_checker_impl.h

-// 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.
-
-#ifndef BASE_SEQUENCE_CHECKER_IMPL_H_
-#define BASE_SEQUENCE_CHECKER_IMPL_H_
-
-#include "base/base_export.h"
-#include "base/basictypes.h"
-#include "base/synchronization/lock.h"
-#include "base/threading/sequenced_worker_pool.h"
-#include "base/threading/thread_checker_impl.h"
-
-namespace base {
-
-// SequenceCheckerImpl is used to help verify that some methods of a
-// class are called in sequence -- that is, called from the same
-// SequencedTaskRunner. It is a generalization of ThreadChecker; in
-// particular, it behaves exactly like ThreadChecker if constructed
-// on a thread that is not part of a SequencedWorkerPool.
-class BASE_EXPORT SequenceCheckerImpl {
- public:
-  SequenceCheckerImpl();
-  ~SequenceCheckerImpl();
-
-  // Returns whether the we are being called on the same sequence token
-  // as previous calls. If there is no associated sequence, then returns
-  // whether we are being called on the underlying ThreadChecker's thread.
-  bool CalledOnValidSequencedThread() const;
-
-  // Unbinds the checker from the currently associated sequence. The
-  // checker will be re-bound on the next call to CalledOnValidSequence().
-  void DetachFromSequence();
-
- private:
-  void EnsureSequenceTokenAssigned() const;
-
-  // Guards all variables below.
-  mutable Lock lock_;
-
-  // Used if |sequence_token_| is not valid.
-  ThreadCheckerImpl thread_checker_;
-  mutable bool sequence_token_assigned_;
-
-  mutable SequencedWorkerPool::SequenceToken sequence_token_;
-
-  DISALLOW_COPY_AND_ASSIGN(SequenceCheckerImpl);
-};
-
-}  // namespace base
-
-#endif  // BASE_SEQUENCE_CHECKER_IMPL_H_