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

sync/test/trackable_mock_invalidation.h

-// Copyright 2014 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_TRACKABLE_MOCK_INVALIDATION_H_
-#define SYNC_TEST_TRACKABLE_MOCK_INVALIDATION_H_
-
-#include <stdint.h>
-
-#include <string>
-
-#include "sync/test/mock_invalidation.h"
-
-namespace syncer {
-
-class MockInvalidationTracker;
-
-// A variant of MockInvalidation that supports acknowledgements.
-//
-// With the help of a MockInvalidationTracker, this can be used to test
-// sync's use of the Drop() and Acknowledge() methods.
-class TrackableMockInvalidation : public MockInvalidation {
- public:
-  TrackableMockInvalidation(bool is_unknown_version,
-                            int64_t version,
-                            const std::string& payload,
-                            MockInvalidationTracker* tracker,
-                            int tracking_id);
-  ~TrackableMockInvalidation() override;
-
-  // Forwards notice of the acknowledgement of this invalidation to the
-  // |tracker_|.
-  void Acknowledge() override;
-
-  // Forwards notice of the drop of this invalidation to the |tracker_|.
-  void Drop() override;
-
-  // Returns the integer used to identify this object with the |tracker_|.
-  int GetTrackingId();
-
- private:
-  // The MockInvalidationTracker that initialized this object, and which keeps
-  // track of its acknowledgement status.  It is expected to outlive the
-  // invalidations.  The data required for unit test assertions lives there.
-  MockInvalidationTracker* tracker_;
-
-  // An identifier that uniquely identifies this invalidation to its
-  // |tracker_|.
-  //
-  // This is necessary in part because invalidations may be short lived; the
-  // invalidation may be deleted by the time we want to make assertions about
-  // its state.
-  int tracking_id_;
-};
-
-}  // namespace syncer
-
-#endif  // SYNC_TEST_TRACKABLE_MOCK_INVALIDATION_H_