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

components/sync/engine/cycle/model_neutral_state.h

Index: components/sync/engine/cycle/model_neutral_state.h
diff --git a/components/sync/sessions/model_neutral_state.h b/components/sync/engine/cycle/model_neutral_state.h
similarity index 89%
rename from components/sync/sessions/model_neutral_state.h
rename to components/sync/engine/cycle/model_neutral_state.h
index 660948d8406522662c89c52e8f2833ecb3ed49bd..2a7faba98a21a18bfce5bf023e725b4e20c29cf1 100644
--- a/components/sync/sessions/model_neutral_state.h
+++ b/components/sync/engine/cycle/model_neutral_state.h
@@ -2,15 +2,14 @@
 // 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
@@ -59,7 +58,6 @@ struct ModelNeutralState {
 
 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_