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

components/sync/engine/cycle/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_
+#ifndef COMPONENTS_SYNC_ENGINE_CYCLE_MODEL_NEUTRAL_STATE_H_
+#define COMPONENTS_SYNC_ENGINE_CYCLE_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();
 
@@ skipping 28 matching lines @@
   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_
+#endif  // COMPONENTS_SYNC_ENGINE_CYCLE_MODEL_NEUTRAL_STATE_H_