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

components/sync/driver/glue/sync_backend_host_mock.h

 // Copyright 2013 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_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
 #define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 67 matching lines @@
 
   void ActivateNonBlockingDataType(
       syncer::ModelType type,
       std::unique_ptr<syncer_v2::ActivationContext>) override;
   void DeactivateNonBlockingDataType(syncer::ModelType type) override;
 
   syncer::UserShare* GetUserShare() const override;
 
   Status GetDetailedStatus() override;
 
-  syncer::sessions::SyncSessionSnapshot GetLastSessionSnapshot() const override;
+  syncer::SyncCycleSnapshot GetLastCycleSnapshot() const override;
 
   bool HasUnsyncedItems() const override;
 
   bool IsNigoriEnabled() const override;
 
   syncer::PassphraseType GetPassphraseType() const override;
 
   base::Time GetExplicitPassphraseTime() const override;
 
   bool IsCryptographerReady(
@@ skipping 26 matching lines @@
 
   void set_fail_initial_download(bool should_fail);
 
  private:
   bool fail_initial_download_;
 };
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_