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

sync/test/test_transaction_observer.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_TEST_TRANSACTION_OBSERVER_H_
-#define SYNC_TEST_TEST_TRANSACTION_OBSERVER_H_
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "sync/internal_api/public/base/model_type.h"
-#include "sync/syncable/transaction_observer.h"
-#include "sync/syncable/write_transaction_info.h"
-
-namespace syncer {
-namespace syncable {
-
-// This class acts as a TransactionObserver for the syncable::Directory.
-// It gathers information that is useful for writing test assertions.
-class TestTransactionObserver :
-  public base::SupportsWeakPtr<TestTransactionObserver>,
-  public TransactionObserver {
- public:
-  TestTransactionObserver();
-  ~TestTransactionObserver() override;
-  void OnTransactionWrite(
-      const ImmutableWriteTransactionInfo& write_transaction_info,
-      ModelTypeSet models_with_changes) override;
-
-  // Returns the number of transactions observed.
-  //
-  // Transactions are generated only when meaningful changes are made.  For most
-  // testing purposes, you may assume that this counts the number of syncer
-  // nudges generated.
-  int transactions_observed();
-
- private:
-  int transactions_observed_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestTransactionObserver);
-};
-
-}  // namespace syncable
-}  // namespace syncer
-
-
-#endif  // SYNC_TEST_TEST_TRANSACTION_OBSERVER_H_