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

sync/engine/sync_cycle_event.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_ENGINE_SYNC_CYCLE_EVENT_H_
-#define SYNC_ENGINE_SYNC_CYCLE_EVENT_H_
-
-#include "sync/base/sync_export.h"
-#include "sync/internal_api/public/sessions/sync_session_snapshot.h"
-
-namespace syncer {
-
-struct SyncProtocolError;
-
-struct SYNC_EXPORT SyncCycleEvent {
-  enum EventCause {
-    ////////////////////////////////////////////////////////////////
-    // Sent on entry of Syncer state machine
-    SYNC_CYCLE_BEGIN,
-
-    // Sent any time progress is made during a sync cycle.
-    STATUS_CHANGED,
-
-    // We have reached the SYNCER_END state in the main sync loop.
-    SYNC_CYCLE_ENDED,
-  };
-
-  explicit SyncCycleEvent(EventCause cause);
-  ~SyncCycleEvent();
-
-  EventCause what_happened;
-
-  // The last session used for syncing.
-  sessions::SyncSessionSnapshot snapshot;
-};
-
-}  // namespace syncer
-
-#endif  // SYNC_ENGINE_SYNC_CYCLE_EVENT_H_