[Sync] Move //sync to //components/sync.

sync/test/callback_counter.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 SYNC_TEST_CALLBACK_COUNTER_H_
-#define SYNC_TEST_CALLBACK_COUNTER_H_
-
-#include "base/macros.h"
-
-namespace syncer {
-
-// Helper class to track how many times a callback is triggered.
-class CallbackCounter {
- public:
-  CallbackCounter() { Reset(); }
-  ~CallbackCounter() {}
-
-  void Reset() { times_called_ = 0; }
-  void Callback() { ++times_called_; }
-  int times_called() const { return times_called_; }
-
- private:
-  int times_called_;
-
-  DISALLOW_COPY_AND_ASSIGN(CallbackCounter);
-};
-
-}  // namespace syncer
-
-#endif  // SYNC_TEST_CALLBACK_COUNTER_H_