[Sync] Move sessions/ to engine/cycle/ and rename things to match.

components/sync/sessions/model_neutral_state.h

-// Copyright 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 COMPONENTS_SYNC_SESSIONS_MODEL_NEUTRAL_STATE_H_
-#define COMPONENTS_SYNC_SESSIONS_MODEL_NEUTRAL_STATE_H_
-
-#include "components/sync/base/model_type.h"
-#include "components/sync/base/syncer_error.h"
-#include "components/sync/protocol/sync.pb.h"
-
-namespace syncer {
-namespace sessions {
-
-// Grouping of all state that applies to all model types.  Note that some
-// components of the global grouping can internally implement finer grained
-// scope control, but the top level entity is still a singleton with respect to
-// model types.
-struct ModelNeutralState {
-  ModelNeutralState();
-  ModelNeutralState(const ModelNeutralState& other);
-  ~ModelNeutralState();
-
-  // The set of types for which updates were requested from the server.
-  ModelTypeSet get_updates_request_types;
-
-  // The set of types for which commits were sent to the server.
-  ModelTypeSet commit_request_types;
-
-  int num_successful_commits;
-
-  // This is needed for monitoring extensions activity.
-  int num_successful_bookmark_commits;
-
-  // Download event counters.
-  int num_updates_downloaded_total;
-  int num_tombstone_updates_downloaded_total;
-  int num_reflected_updates_downloaded_total;
-
-  // Update application and conflicts.
-  int num_updates_applied;
-  int num_encryption_conflicts;
-  int num_server_conflicts;
-  int num_hierarchy_conflicts;
-
-  // Overwrites due to conflict resolution counters.
-  int num_local_overwrites;
-  int num_server_overwrites;
-
-  // Records the most recent results of GetKey, PostCommit and GetUpdates
-  // commands.
-  SyncerError last_get_key_result;
-  SyncerError last_download_updates_result;
-  SyncerError commit_result;
-
-  // Set to true by PostCommitMessageCommand if any commits were successful.
-  bool items_committed;
-};
-
-bool HasSyncerError(const ModelNeutralState& state);
-
-}  // namespace sessions
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_SESSIONS_MODEL_NEUTRAL_STATE_H_