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

components/sync/engine/cycle/update_counters.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 COMPONENTS_SYNC_SESSIONS_UPDATE_COUNTERS_H_
-#define COMPONENTS_SYNC_SESSIONS_UPDATE_COUNTERS_H_
+#ifndef COMPONENTS_SYNC_ENGINE_CYCLE_UPDATE_COUNTERS_H_
+#define COMPONENTS_SYNC_ENGINE_CYCLE_UPDATE_COUNTERS_H_
 
 #include <memory>
 #include <string>
 
 #include "base/values.h"
 
 namespace syncer {
 
 // A class to maintain counts related to the update requests and responses for
 // a particular sync type.
@@ skipping 11 matching lines @@
   int num_updates_applied;
   int num_hierarchy_conflict_application_failures;
   int num_encryption_conflict_application_failures;
 
   int num_server_overwrites;
   int num_local_overwrites;
 };
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_SESSIONS_UPDATE_COUNTERS_H_
+#endif  // COMPONENTS_SYNC_ENGINE_CYCLE_UPDATE_COUNTERS_H_